Backhouse, F. (2005). Woodpeckers of North America. Firefly Books.
Cita Chicago Style (17a ed.)Backhouse, Frances. Woodpeckers of North America. Richmond Hill, ON ; Buffalo, N.Y.: Firefly Books, 2005.
Cita MLA (8a ed.)Backhouse, Frances. Woodpeckers of North America. Firefly Books, 2005.
Precaución: Estas citas no son 100% exactas.