Cita APA (7th ed.)

Forsman, E. D., DeStefano, S., Raphael, M. G., & Gutiérrez, R. J. (1996). Demography of the northern spotted owl. Cooper Ornithological Society.

Cita Chicago (17th ed.)

Forsman, Eric D., Stephen DeStefano, Martin G. Raphael, i R. J. Gutiérrez. Demography of the Northern Spotted Owl. Lawrence, California, USA: Cooper Ornithological Society, 1996.

Cita MLA (9th ed.)

Forsman, Eric D., et al. Demography of the Northern Spotted Owl. Cooper Ornithological Society, 1996.