Keep, A. V. (1981). The Premenstrual Syndrome.
芝加哥风格引文Keep, A. Van. The Premenstrual Syndrome. 1981.
MLA引文Keep, A. Van. The Premenstrual Syndrome. 1981.
警告：这些引文格式不一定是100％准确.
APA引文
Keep, A. V. (1981). The Premenstrual Syndrome.
芝加哥风格引文Keep, A. Van. The Premenstrual Syndrome. 1981.
MLA引文Keep, A. Van. The Premenstrual Syndrome. 1981.