Halpern, S. L. (1970). The medical clinics of North America.
芝加哥风格引文Halpern, Seymour Lionel. The Medical Clinics of North America. 1970.
MLA引文Halpern, Seymour Lionel. The Medical Clinics of North America. 1970.
警告：这些引文格式不一定是100％准确.
APA引文