Keep, A. V. (1981). The Premenstrual Syndrome.
Cita Chicago (17th ed.)Keep, A. Van. The Premenstrual Syndrome. 1981.
Cita MLA (9th ed.)Keep, A. Van. The Premenstrual Syndrome. 1981.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)