APA (7th ed.) Citation

Gregor, H. F. (1974). An agricultural typology of California.

Chicago Style (17th ed.) Citation

Gregor, Howard F. An Agricultural Typology of California. 1974.

MLA (9th ed.) Citation

Gregor, Howard F. An Agricultural Typology of California. 1974.

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