APA

Linsley E. G., Rick C. M. & Stephens S. G. (1966). Observations on the floral relationships of the Galápagos carpenter bee (Hymenoptera: Apidae). : .

Chicago

Linsley E G, Rick C M and Stephens S G. 1966. Observations on the floral relationships of the Galápagos carpenter bee (Hymenoptera: Apidae). : .

Harvard

Linsley E. G., Rick C. M. and Stephens S. G. (1966). Observations on the floral relationships of the Galápagos carpenter bee (Hymenoptera: Apidae). : .

MLA

Linsley E G, Rick C M and Stephens S G. Observations on the floral relationships of the Galápagos carpenter bee (Hymenoptera: Apidae). : . 1966.