Cita APA

(1974). Population reports. Series I, Periodic abstinence. Washington, D.C.: Population Information Program.

Citación estilo Chicago

Population Reports. Series I, Periodic Abstinence. Washington, D.C.: Population Information Program, 1974.

Cita MLA

Population Reports. Series I, Periodic Abstinence. Washington, D.C.: Population Information Program, 1974.

Precaución: Estas citas no son 100% exactas.