APA
Robert M. Zollinger, . (1979). American Journal Of Surgery. New York: American Business Press, Inc.
Chicago
Robert M. Zollinger, . 1979. American Journal Of Surgery. New York: American Business Press, Inc.
Harvard
Robert M. Zollinger, . (1979). American Journal Of Surgery. New York: American Business Press, Inc.
MLA
Robert M. Zollinger, . American Journal Of Surgery. New York: American Business Press, Inc. 1979.