APA (7th ed.) Citation

Willoughby, E. E. (1947). Fifty printers' marks. Book Arts Club, Univ. of California.

Chicago Style (17th ed.) Citation

Willoughby, Edwin Eliott. Fifty Printers' Marks. Berkeley: Book Arts Club, Univ. of California, 1947.

MLA (8th ed.) Citation

Willoughby, Edwin Eliott. Fifty Printers' Marks. Book Arts Club, Univ. of California, 1947.

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