APA (7th ed.) Citation

Valéry, P., Morison, S., & Jackson, H. (1968). Thoughts on book design. H. van Krimpen.

Chicago Style (17th ed.) Citation

Valéry, Paul, Stanley Morison, and Holbrook Jackson. Thoughts on Book Design. [Place of publication not identified]: H. van Krimpen, 1968.

MLA (9th ed.) Citation

Valéry, Paul, et al. Thoughts on Book Design. H. van Krimpen, 1968.