APA
Robert M. Zollinger, . (1961). The American Journal of Surgery. New York: The American Journal of Surgery.
Chicago
Robert M. Zollinger, . 1961. The American Journal of Surgery. New York: The American Journal of Surgery.
Harvard
Robert M. Zollinger, . (1961). The American Journal of Surgery. New York: The American Journal of Surgery.
MLA
Robert M. Zollinger, . The American Journal of Surgery. New York: The American Journal of Surgery. 1961.