Não informado. (1931). American Fruit Grower. American Fruit Grower Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Fruit Grower. Willoughby, Ohio: American Fruit Grower Publishing, 1931.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Fruit Grower. American Fruit Grower Publishing, 1931.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.