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Cinamon, Gerald (1987): "Hans Schmoller, Typographer", The Monotype Recorder (New Series), 6 April 1987.

Graham, Tim (2003): Penguin in Print - a Bibliography. Penguin Collectors Society.

Hall, David J., "King Penguins", in The Private Library Winter 1977, published by the Private Libraries Association.

Hare, Steve (1995): Penguin Portrait: Allen Lane and the Penguin Editors, 1935–1970. London: Penguin Books.

Joicey, Nicholas (1993): "A Paperback Guide to Progress: Penguin Books 1935–c.1951", Twentieth Century British History, Vol. 4, No. 1, pp. 25–56.

Kells, Stuart (2015): "Penguin and the Lane Brothers: The Untold Story of a Publishing Revolution", Black Inc., Melbourne, Australia.

Lewis, Jeremy (2005): Penguin Special: Life and Times of Allen Lane .

Morpurgo, J. E. (1979): Allen Lane: King Penguin. London: Hutchinson.

Aynsley, J., Lloyd Jones, L. (1985), Fifty Penguin Years. .

Cherry, B. (1983): The Buildings of England: A short History and Bibliography, Penguin Collectors Society, London.

Edwards, R. (1997): A Penguin Collector's Companion, Penguin Collector's Society, London.

Holland, S. (1993): Mushroom Jungle: A History of Postwar Paperback Publishing, Westbury.

Pearson, J. (1996): Penguins March On: Books for the Forces During World War II, Penguin Collector's Society, London.

Lane, A., Fowler, D. et al. (1960): Penguins Progress, 1935-1960, Harmondsworth.

Ten Years of Penguins: 1935-1945, Harmondsworth.

Williams, W. E. (1956): The Penguin Story, Harmondsworth.

Wood, S. (1985): A Sort of Dignified Flippancy, Edinburgh University Library.