APA (7th ed.) Citation

Grim, R. E. (1957). Petrology of the Paleozoic shales of Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Grim, Ralph E. Petrology of the Paleozoic Shales of Illinois. Urbana: [publisher not identified], 1957.

MLA (9th ed.) Citation

Grim, Ralph E. Petrology of the Paleozoic Shales of Illinois. [publisher not identified], 1957.

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