APA (7th ed.) Citation

Willis, B. (1912). Index to the stratigraphy of North America. Government Printing Office.

Chicago Style (17th ed.) Citation

Willis, Bailey. Index to the Stratigraphy of North America. Washington: Government Printing Office, 1912.

MLA (9th ed.) Citation

Willis, Bailey. Index to the Stratigraphy of North America. Government Printing Office, 1912.

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