UNITED NATIONS DEV.PROGRAMMS. (1971). HUMAN FERTILITYN AND NATIONAL DEVELOPMENT. UNITED NATIONS.
Cita Chicago (17th ed.)UNITED NATIONS DEV.PROGRAMMS. HUMAN FERTILITYN AND NATIONAL DEVELOPMENT. NEW YORK: UNITED NATIONS, 1971.
Cita MLA (9th ed.)UNITED NATIONS DEV.PROGRAMMS. HUMAN FERTILITYN AND NATIONAL DEVELOPMENT. UNITED NATIONS, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.