APA (7th ed.) Citation

Vaessen, M. (1980). Knowledge of contraceptive methods. Internat. Statist. Inst.

Chicago Style (17th ed.) Citation

Vaessen, Martin. Knowledge of Contraceptive Methods. Voorburg: Internat. Statist. Inst, 1980.

MLA (9th ed.) Citation

Vaessen, Martin. Knowledge of Contraceptive Methods. Internat. Statist. Inst, 1980.

Warning: These citations may not always be 100% accurate.