Παραπομπή σε μορφή APA (7η εκδ.)

Fenson, L. (1994). Variability in early communicative development. Society for Research in Child Development.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Fenson, Larry. Variability in Early Communicative Development. Chicago, Illinois: Society for Research in Child Development, 1994.

Παραπομπή σε μορφή MLA (9th εκδ.)

Fenson, Larry. Variability in Early Communicative Development. Society for Research in Child Development, 1994.