Παραπομπή σε μορφή APA (7η εκδ.)

Harper Collins Publishers, Fitter, R., Heinzel, H., & Parslow, J. (1997). Birds of Britain & Europe: With North Africa & the Middle East. Harper Collins Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Harper Collins Publishers, R. Fitter, H. Heinzel, και J. Parslow. Birds of Britain & Europe: With North Africa & the Middle East. London: Harper Collins Publishers, 1997.

Παραπομπή σε μορφή MLA (8th εκδ.)

Harper Collins Publishers, et al. Birds of Britain & Europe: With North Africa & the Middle East. Harper Collins Publishers, 1997.