APA-Zitierstil (7. Ausg.)

Roper, C. F. E., Young, R. E., & Voss, G. L. (1969). An illustrated key to the families of the order Teuthoidea (Cephalopoda). Smithsonian Inst. Press.

Chicago-Zitierstil (17. Ausg.)

Roper, Clyde F. E., Richard E. Young, und Gilbert L. Voss. An Illustrated Key to the Families of the Order Teuthoidea (Cephalopoda). Washington: Smithsonian Inst. Press, 1969.

MLA-Zitierstil (9. Ausg.)

Roper, Clyde F. E., et al. An Illustrated Key to the Families of the Order Teuthoidea (Cephalopoda). Smithsonian Inst. Press, 1969.