Cita APA

Ryan, J. D. 1., & Ryan, J. D. 1. (1964). Geology of Edgemont quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office.

Citación estilo Chicago

Ryan, John Donald 1921-, y John Donald 1921- Ryan. Geology of Edgemont Quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office, 1964.

Cita MLA

Ryan, John Donald 1921-, y John Donald 1921- Ryan. Geology of Edgemont Quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office, 1964.