APA (7th ed.) Citation

Gourdie, T. (1961). The Puffin book of lettering. Penguin Books.

Chicago Style (17th ed.) Citation

Gourdie, Tom. The Puffin Book of Lettering. Harmondsworth, Middlesex: Penguin Books, 1961.

MLA (9th ed.) Citation

Gourdie, Tom. The Puffin Book of Lettering. Penguin Books, 1961.

Warning: These citations may not always be 100% accurate.