Citazione APA

Ryder, R. E. (1993). "Natural family planning": Effective birth control supported by the Catholic Church.

Stile di citazione Chicago

Ryder, R E. "Natural Family Planning": Effective Birth Control Supported By the Catholic Church. 1993.

Citazione MLA

Ryder, R E. "Natural Family Planning": Effective Birth Control Supported By the Catholic Church. 1993.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.