Filsafat perenial
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Soares de Azevedo, Mateus (2005), Ye Shall Know the Truth: Christianity and the Perennial Philosophy, World Wisdom, ISBN 0-941532-69-0
Blavatsky, Helena Petrovna (1997), The Key to Theosophy, Mumbai, India: Theosophy Company
James S. Cutsinger, The Fullness of God: Frithjof Schuon on Christianity, Bloomington, Indiana: World Wisdom, 2004
Drury, Nevill (2004), The New Age: Searching for the Spiritual Self, London, England, UK: Thames and Hudson, ISBN 0-500-28516-0
Durant; Durant (1966), Will Durant, The Story of Civilization. Volume 2: The Life of Greece, Simon and Schuster
Ranjit Fernando (ed.) (1991), The Unanimous Tradition, Essays on the essential unity of all religions. Sri Lanka Institute of Traditional Studies, 1991 ISBN 955-9028-01-4
Hori, Victor Sogen (1999), Translating the Zen Phrase Book. In: Nanzan Bulletin 23 (1999) (PDF), diarsipkan (PDF) dari versi asli tanggal 2020-01-16, diakses tanggal 2021-10-01
Huxley, Aldous (1945), The perennial philosophy (edisi ke-1st), New York: Harper & Brothers
Huxley, Aldous (1990), The Perennial Philosophy (edisi ke-Harper Perennial 1990), Harper & Row, ISBN 0-06-090191-8
Huxley, Aldous (2004), The Perennial Philosophy (edisi ke-Harper Modern Classics 2004), Harper & Row, ISBN 0-06-057058-X
John Holman (2008), The Return of the Perennial Philosophy: The Supreme Vision of Western Esotericism. Watkins Publishing, ISBN 1-905857-46-2
Jacobs, Alan (2004), Advaita and Western Neo-Advaita. In: The Mountain Path Journal, autumn 2004, pages 81-88, Ramanasramam, diarsipkan dari versi asli tanggal 2015-05-18  Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
Perennial Philosophy, Brenda Jackson, Ronald L McDonald, Penguin Group (USA) ISBN 0-452-00144-7
King, Richard (2002), Orientalism and Religion: Post-Colonial Theory, India and "The Mystic East", Routledge
Lings, Martin; Minnaar, Clinton (2007), The Underlying Religion: An Introduction to the Perennial Philosophy, World Wisdom, ISBN 9781933316437
The other perennial philosophy: a metaphysical dialectic, Author	Alan M. Laibelman, University Press of America, (2000), ISBN 0-7618-1827-8
McMahan, David L. (2008), The Making of Buddhist Modernism, Oxford University Press, ISBN 9780195183276
"The Mystery of the Two Natures", in Barry McDonald (ed.), Every Branch in Me: Essays on the Meaning of Man, Bloomington, Indiana: World Wisdom, 2002
McEvilley, Thomas (2002), The Shape of Ancient Thought
Frithjof Schuon and the Perennial Philosophy, Authors Harry Oldmeadow and William Stoddart, Contributor	William Stoddart, Publisher World Wisdom, Inc, (2010) ISBN 1-935493-09-4
Parsons, William B. (2011), Teaching Mysticism, Oxford University Press
Whitall N. Perry, A Treasury of Traditional Wisdom, Louisville, Kentucky: Fons Vitae, 2001
Prothero, Stephen (2010), God is Not One: The Eight Rival Religions That Run the World--and Why Their Differences Matter, HarperOne, ISBN 978-0-06-157127-5
Roy, Sumita (2003), Aldous Huxley And Indian Thought, Sterling Publishers Pvt. Ltd
Schmitt, Charles (1966), "Perennial Philosophy: From Agostino Steuco to Leibniz", Journal of the History of Ideas, 27 (1): 505–532), doi:10.2307/2708338, JSTOR 2708338
Sharf, Robert H. (2000), "The Rhetoric of Experience and the Study of Religion" (PDF), Journal of Consciousness Studies, 7 (11–12): 267–87, diarsipkan dari versi asli (PDF) tanggal 2013-05-13, diakses tanggal 2013-05-04  Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
Shear, Jonathan (1994), "On Mystical Experiences as Support for the Perennial Philosophy", Journal of the American Academy of Religion, 62 (2): 319–342, doi:10.1093/jaarel/LXII.2.319, JSTOR 1465269
Sherrard, Philip (1998), "Christianity and Other Sacred Traditions", Christianity: Lineaments of a Sacred Tradition, Brookline, Massachusetts: Holy Cross Orthodox Press
Shipley, Morgan (2015), Psychedelic Mysticism: Transforming Consciousness, Religious Experiences, and Voluntary Peasants in Postwar America, Lexington Books
Slavenburg; Glaudemans (1994), Nag Hammadi Geschriften I, Ankh-Hermes
Smith, Huston (1987), "Is There a Perennial Philosophy?", Journal of the American Academy of Religion, 55 (3): 553–566, doi:10.1093/jaarel/LV.3.553, JSTOR 1464070