Saya mau tau Rujukan dari Rudolf Christoph Eucken. Jelaskan dalam bahasa melayu

Beck, Friedrich Alfred. Rudolf Eucken, Deutsche Buch-Gemeinschaft, 1927.

Booth, Meyrick. Rudolf Eucken: His Philosophy and Influence, Charles Scribner's Sons, 1913.

Feuling, Daniel. "Rudolf Eucken's Philosophy," The Dublin Review, Vol. CLV, July/October, 1914.

Gibson, W. R. Boyce. Rudolf Eucken's Philosophy of Life, A. & C. Black, 1915.

Jones, Abel J. Rudolf Eucken: A Philosophy of Life, T. C. & E. C. Jack, 1913.

Jones, W. Tudor. Rudolf Eucken: His Life and Philosophy,'' Haldeman-Julius Co., 1920.

MacSwiney, Margaret Mary. Rudolf Eucken and the Spiritual Life, National Capital Press, 1915.

Eucken, Rudolf Christoph at Nobel-winners.com

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