APA

Kelly W. J., . (1971). A cost-effectiveness study of clinical methods of birth control: with special reference to Puerto Rico. New York: Praeger Publishers.

Chicago

Kelly William J, . 1971. A cost-effectiveness study of clinical methods of birth control: with special reference to Puerto Rico. New York: Praeger Publishers.

Harvard

Kelly W. J., . (1971). A cost-effectiveness study of clinical methods of birth control: with special reference to Puerto Rico. New York: Praeger Publishers.

MLA

Kelly William J, . A cost-effectiveness study of clinical methods of birth control: with special reference to Puerto Rico. New York: Praeger Publishers. 1971.