Não informado. (1957). Home Economics Research Reports. U.S. Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Home Economics Research Reports. Washington: U.S. Department of Agriculture, 1957.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Home Economics Research Reports. U.S. Department of Agriculture, 1957.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.