Παραπομπή σε μορφή APA (7η εκδ.)

Christensen, S. K. (1953). A comparative study of the milk control programs of the northeastern states.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Christensen, Seymour Kent. A Comparative Study of the Milk Control Programs of the Northeastern States. [Ithaca, N.Y.], 1953.

Παραπομπή σε μορφή MLA (8th εκδ.)

Christensen, Seymour Kent. A Comparative Study of the Milk Control Programs of the Northeastern States. 1953.