Cita APA (7th ed.)

Oppenheim, J., & Reid, B. (1986). Have you seen birds? North Winds Press.

Cita Chicago (17th ed.)

Oppenheim, Joanne, i Bárbara Reid. Have You Seen Birds? Ottawa: North Winds Press, 1986.

Cita MLA (9th ed.)

Oppenheim, Joanne, i Bárbara Reid. Have You Seen Birds? North Winds Press, 1986.