Παραπομπή σε μορφή APA (7η εκδ.)

Gerard, J. (1889). Science and Scientists: Some Papers on Natural History: No. VI. Instinct and Its Lessons. London.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gerard, John. Science and Scientists: Some Papers on Natural History: No. VI. Instinct and Its Lessons. London, 1889.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gerard, John. Science and Scientists: Some Papers on Natural History: No. VI. Instinct and Its Lessons. London, 1889.