APA引文

WHO. (1987). Mechanism of action, safety and efficacy of intrauterine devices. Geneva.

Chicago Edition Citation

WHO. Mechanism of Action, Safety and Efficacy of Intrauterine Devices. Geneva, 1987.

MLA引文

WHO. Mechanism of Action, Safety and Efficacy of Intrauterine Devices. Geneva, 1987.

警告：這些引文格式不一定是100％准確.