Παραπομπή σε μορφή APA (7η εκδ.)

Arnbom, T. (1994). Maternal investment in male and female offspring in the southern elephant seal. Dept. of Zoology, Stockholm University.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Arnbom, Tom. Maternal Investment in Male and Female Offspring in the Southern Elephant Seal. Stockholm, Sweden: Dept. of Zoology, Stockholm University, 1994.

Παραπομπή σε μορφή MLA (8th εκδ.)

Arnbom, Tom. Maternal Investment in Male and Female Offspring in the Southern Elephant Seal. Dept. of Zoology, Stockholm University, 1994.