Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.