APA (7th ed.) Citation

Cady, G. H. (1935). Classification and selection of Illinois coals. State Geological Survey.

Chicago Style (17th ed.) Citation

Cady, Gilbert H. Classification and Selection of Illinois Coals. Urbana: State Geological Survey, 1935.

MLA (9th ed.) Citation

Cady, Gilbert H. Classification and Selection of Illinois Coals. State Geological Survey, 1935.

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