APA (7th ed.) Citation

Weller, S. (1907). The geological map of Illinois (2d ed.). University of Illinois.

Chicago Style (17th ed.) Citation

Weller, Stuart. The Geological Map of Illinois. 2d ed. Urbana: University of Illinois, 1907.

MLA (9th ed.) Citation

Weller, Stuart. The Geological Map of Illinois. 2d ed. University of Illinois, 1907.