Cita APA

Roosevelt, T. 1., & Morison, E. E. 1. (1954). Cowboys and kings: Three great letters by Theodore Roosevelt. Cambridge: Harvard University Press.

Citación estilo Chicago

Roosevelt, Theodore 1858-1919, y Elting Elmore 1909-1995 Morison. Cowboys and Kings: Three Great Letters By Theodore Roosevelt. Cambridge: Harvard University Press, 1954.

Cita MLA

Roosevelt, Theodore 1858-1919, y Elting Elmore 1909-1995 Morison. Cowboys and Kings: Three Great Letters By Theodore Roosevelt. Cambridge: Harvard University Press, 1954.