De Guzman, D. Swine production in the Philippines: A project study. n.p.
芝加哥风格引文De Guzman, Danilo. Swine Production in the Philippines: A Project Study. [Manila: n.p.
MLA引文De Guzman, Danilo. Swine Production in the Philippines: A Project Study. n.p.
警告：这些引文格式不一定是100％准确.