APA (7th ed.) Citation

Timberlake, P. H. (1971). Supplementary studies on the systematics of the genus Perdita (Hymenoptera, Andrenidae). University of California.

Chicago Style (17th ed.) Citation

Timberlake, P. H. Supplementary Studies on the Systematics of the Genus Perdita (Hymenoptera, Andrenidae). Berkeley: University of California, 1971.

MLA (9th ed.) Citation

Timberlake, P. H. Supplementary Studies on the Systematics of the Genus Perdita (Hymenoptera, Andrenidae). University of California, 1971.