APA (7th ed.) Citation

Durrenberger, R., Etzel Pearcy, G., & Hoffman, G. W. (1969). California the last frontier. Van nostrand Reinhold company.

Chicago Style (17th ed.) Citation

Durrenberger, Robert, G. Etzel Pearcy, and George W. Hoffman. California the Last Frontier. New York: Van nostrand Reinhold company, 1969.

MLA (9th ed.) Citation

Durrenberger, Robert, et al. California the Last Frontier. Van nostrand Reinhold company, 1969.