Παραπομπή σε μορφή APA (7η εκδ.)

Gosler, A., Gosler, A., & Perrins, C. (1987). Some aspects of bill morphology in relation to ecology in the great tit Parus major.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gosler, A., Andrew Gosler, και C. Perrins. Some Aspects of Bill Morphology in Relation to Ecology in the Great Tit Parus Major. 1987.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gosler, A., et al. Some Aspects of Bill Morphology in Relation to Ecology in the Great Tit Parus Major. 1987.