Cita APA (7a ed.)

Pfefferkorn, I., & Treutlein, T. E. (1989). Sonora: A description of the province. University of Arizona Press.

Cita Chicago Style (17a ed.)

Pfefferkorn, Ignaz, y Theodore E. Treutlein. Sonora: A Description of the Province. Tucson: University of Arizona Press, 1989.

Cita MLA (9a ed.)

Pfefferkorn, Ignaz, y Theodore E. Treutlein. Sonora: A Description of the Province. University of Arizona Press, 1989.