Research digest. U.P. Office of Research Coordination.
芝加哥风格引文Research Digest. Quezon City: U.P. Office of Research Coordination.
MLA引文Research Digest. U.P. Office of Research Coordination.
警告：这些引文格式不一定是100％准确.
APA引文
Research digest. U.P. Office of Research Coordination.
芝加哥风格引文Research Digest. Quezon City: U.P. Office of Research Coordination.
MLA引文Research Digest. U.P. Office of Research Coordination.