APA (7th ed.) Citation

Clapp, W. F., & Kenk, R. (1956). Marine borers, a preliminary bibliography. [publisher not identified].

Chicago Style (17th ed.) Citation

Clapp, William F., and Roman Kenk. Marine Borers, a Preliminary Bibliography. Washington: [publisher not identified], 1956.

MLA (9th ed.) Citation

Clapp, William F., and Roman Kenk. Marine Borers, a Preliminary Bibliography. [publisher not identified], 1956.