Citazione Stile APA (7a Edizione)

Bongaarts, J. (1991). The KAP-gap and the unmet need for contraception. Population Council.

Citazione stile Chigago Style (17a edizione)

Bongaarts, John. The KAP-gap and the Unmet Need for Contraception. New York: Population Council, 1991.

Citatione MLA (9a ed.)

Bongaarts, John. The KAP-gap and the Unmet Need for Contraception. Population Council, 1991.