Cita APA (7a ed.)

Neill, W., & Hepburn, D. (2007). Butterflies of the Pacific Northwest. Mountain Press Pub. Co..

Cita Chicago Style (17a ed.)

Neill, William, y Doug Hepburn. Butterflies of the Pacific Northwest. Missoula, Mont.: Mountain Press Pub. Co., 2007.

Cita MLA (8a ed.)

Neill, William, y Doug Hepburn. Butterflies of the Pacific Northwest. Mountain Press Pub. Co., 2007.

Precaución: Estas citas no son 100% exactas.