APA aipamena

Immerwahr, G. (1981). Contraceptive use in Sri Lanka. International Statistical Institute ; World Fertility Survey.

Chicago Style aipamena

Immerwahr, George. Contraceptive Use in Sri Lanka. Voorburg, Netherlands : London: International Statistical Institute ; World Fertility Survey, 1981.

MLA aipamena

Immerwahr, George. Contraceptive Use in Sri Lanka. International Statistical Institute ; World Fertility Survey, 1981.