APA Citation

Willey, G. R. 1., & Willey, G. R. 1. North and Middle America.

Chicago Style Citation

Willey, Gordon Randolph 1913-2002, and Gordon Randolph 1913-2002 Willey. North and Middle America.

MLA Citation

Willey, Gordon Randolph 1913-2002, and Gordon Randolph 1913-2002 Willey. North and Middle America.

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