Não informado. (1931). American Fruit Grower. American Fruit Grower Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Fruit Grower. Willoughby, Ohio: American Fruit Grower Publishing, 1931.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Fruit Grower. American Fruit Grower Publishing, 1931.
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