Tolong jelaskan mengenai Penguin by Illustrators. dari Penguin Books

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.

The Art of Penguin Science Fiction The history and cover art of science fiction published by Penguin Books from 1935 to the present day

Penguin First Editions Guide to the early (1935-1955) first editions published by Penguin Books