APA (7th ed.) Citation

Whitney, J. D. Geological map of the lead region in the states of Wisconsin, Illinois & Iowa.

Chicago Style (17th ed.) Citation

Whitney, J. D. Geological Map of the Lead Region in the States of Wisconsin, Illinois & Iowa. [187-?].

MLA (8th ed.) Citation

Whitney, J. D. Geological Map of the Lead Region in the States of Wisconsin, Illinois & Iowa.

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