Cita APA (7a ed.)

Neill, W., & Hepburn, D. (1976). Butterflies afield in the Pacific Northwest. Pacific Search Books.

Cita Chicago Style (17a ed.)

Neill, William, y Doug Hepburn. Butterflies Afield in the Pacific Northwest. Seattle: Pacific Search Books, 1976.

Cita MLA (8a ed.)

Neill, William, y Doug Hepburn. Butterflies Afield in the Pacific Northwest. Pacific Search Books, 1976.

Precaución: Estas citas no son 100% exactas.