American Soybean Association. (1973). Soybean digest blue book. American Soybean Association.
Chicago Style (17th ed.) CitationAmerican Soybean Association. Soybean Digest Blue Book. Hudson, Iowa: American Soybean Association, 1973.
MLA (9th ed.) CitationAmerican Soybean Association. Soybean Digest Blue Book. American Soybean Association, 1973.
Warning: These citations may not always be 100% accurate.