APA (7th ed.) Citation

Cady, G. H. (1935). Classification and selection of Illinois coals. [publisher not identified].

Chicago Style (17th ed.) Citation

Cady, Gilbert H. Classification and Selection of Illinois Coals. Urbana: [publisher not identified], 1935.

MLA (9th ed.) Citation

Cady, Gilbert H. Classification and Selection of Illinois Coals. [publisher not identified], 1935.

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