APA

OB́rien J. A., . (1938). Natural birth control without contraceptives. Huntington, Indiana: s.n.

Chicago

OB́rien John Anthony, . 1938. Natural birth control without contraceptives. Huntington, Indiana: s.n.

Harvard

OB́rien J. A., . (1938). Natural birth control without contraceptives. Huntington, Indiana: s.n.

MLA

OB́rien John Anthony, . Natural birth control without contraceptives. Huntington, Indiana: s.n. 1938.