APA引文

Thomas, H., Murphy, M., Key, T., Fentiman, I., Allen, D., & Kinlen, L. (1998). Pregnancy and menstrual hormone levels in mothers of twins compared to mothers of singletons.

Chicago Style (17th ed.) Citation

Thomas, H., M. Murphy, T. Key, I. Fentiman, D. Allen, and L. Kinlen. Pregnancy and Menstrual Hormone Levels in Mothers of Twins Compared to Mothers of Singletons. 1998.

MLA引文

Thomas, H., et al. Pregnancy and Menstrual Hormone Levels in Mothers of Twins Compared to Mothers of Singletons. 1998.