APA (7th ed.) Citation

Pfefferkorn, I., & Treutlein, T. E. (1949). Sonora, a description of the province. Coronado cuarto centennial publications, 1540 - 1940.

Chicago Style (17th ed.) Citation

Pfefferkorn, Ignaz, and Theodore E. Treutlein. "Sonora, a Description of the Province." Coronado Cuarto Centennial Publications, 1540 - 1940 1949.

MLA (9th ed.) Citation

Pfefferkorn, Ignaz, and Theodore E. Treutlein. "Sonora, a Description of the Province." Coronado Cuarto Centennial Publications, 1540 - 1940, 1949.

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