APA
Ralph A. Reis, . (1961). Obstetrics Gynecology. New York: Medical Division of Harper & Brothers.
Chicago
Ralph A. Reis, . 1961. Obstetrics Gynecology. New York: Medical Division of Harper & Brothers.
Harvard
Ralph A. Reis, . (1961). Obstetrics Gynecology. New York: Medical Division of Harper & Brothers.
MLA
Ralph A. Reis, . Obstetrics Gynecology. New York: Medical Division of Harper & Brothers. 1961.