APA (7th ed.) Citation

Snyder, L. L. (1958). Historic documents of World War I. Van Nostrand.

Chicago Style (17th ed.) Citation

Snyder, Louis L. Historic Documents of World War I. Princeton, N.J.: Van Nostrand, 1958.

MLA (9th ed.) Citation

Snyder, Louis L. Historic Documents of World War I. Van Nostrand, 1958.