American Berkshire association. (1883). The swine breeder's manual. The American Berkshire association.
芝加哥风格引文American Berkshire association. The Swine Breeder's Manual. Springfield, Ill.: The American Berkshire association, 1883.
MLA引文American Berkshire association. The Swine Breeder's Manual. The American Berkshire association, 1883.
警告：这些引文格式不一定是100％准确.