WHO. (1987). Mechanism of action, safety and efficacy of intrauterine devices. Geneva.
استشهاد بنمط شيكاغوWHO. Mechanism of Action, Safety and Efficacy of Intrauterine Devices. Geneva, 1987.
MLA استشهادWHO. Mechanism of Action, Safety and Efficacy of Intrauterine Devices. Geneva, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.