Hurd, P. D., & Linsley, E. G. (1964). The Squash and gourd bees - genera Peponapis Robertson and Xenoglossa Smith - inhabiting America North of Mexico: (Hymenoptera: Apoidea). Univ. of Calif.
Chicago Style (17th ed.) CitationHurd, Paul David, and E. Gorton Linsley. The Squash and Gourd Bees - Genera Peponapis Robertson and Xenoglossa Smith - Inhabiting America North of Mexico: (Hymenoptera: Apoidea). Berkeley, Calif: Univ. of Calif, 1964.
MLA (9th ed.) CitationHurd, Paul David, and E. Gorton Linsley. The Squash and Gourd Bees - Genera Peponapis Robertson and Xenoglossa Smith - Inhabiting America North of Mexico: (Hymenoptera: Apoidea). Univ. of Calif, 1964.
Warning: These citations may not always be 100% accurate.