Παραπομπή σε μορφή APA (7η εκδ.)

Meulen, J. v. d. (1989). Time and nature of the signal for maternal recognition of pregnancy in the pig.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Meulen, Jan van der. Time and Nature of the Signal for Maternal Recognition of Pregnancy in the Pig. 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Meulen, Jan van der. Time and Nature of the Signal for Maternal Recognition of Pregnancy in the Pig. 1989.