APA (7th ed.) Citation

Keep, A. V. (1981). The Premenstrual Syndrome.

Chicago Style (17th ed.) Citation

Keep, A. Van. The Premenstrual Syndrome. 1981.

MLA (9th ed.) Citation

Keep, A. Van. The Premenstrual Syndrome. 1981.

Warning: These citations may not always be 100% accurate.