Comstock, J. A. (1927). Butterflies of California: A popular guide to a knowledge of the butterflies of California, embracing all of the 477 species and varieties at present recorded for the state. J.A. Comstock.
Chicago Style (17th ed.) CitationComstock, John A. Butterflies of California: A Popular Guide to a Knowledge of the Butterflies of California, Embracing All of the 477 Species and Varieties at Present Recorded for the State. Los Angeles, Calif.: J.A. Comstock, 1927.
MLA (9th ed.) CitationComstock, John A. Butterflies of California: A Popular Guide to a Knowledge of the Butterflies of California, Embracing All of the 477 Species and Varieties at Present Recorded for the State. J.A. Comstock, 1927.
Warning: These citations may not always be 100% accurate.