APA استشهاد

Fridthjof, J. (1962). Encouraging the use of proteins,rich foods. F.A.O.

استشهاد بنمط شيكاغو

Fridthjof, John. Encouraging the Use of Proteins,rich Foods. Rame: F.A.O, 1962.

MLA استشهاد

Fridthjof, John. Encouraging the Use of Proteins,rich Foods. F.A.O, 1962.