APA (7th ed.) Citation

Hatmaker, P. (1931). Diatomite. [publisher not identified].

Chicago Style (17th ed.) Citation

Hatmaker, Paul. Diatomite. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

Hatmaker, Paul. Diatomite. [publisher not identified], 1931.

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