APA
"United Nations I. E. A. S. A., "United Nations I. E. A. S. A., . (1990). Patterns of first marriage. UN: NY.
Chicago
"United Nations International Economic And Social Affairs", "United Nations International Economic And Social Affairs", . 1990. Patterns of first marriage. UN: NY.
Harvard
"United Nations I. E. A. S. A., "United Nations I. E. A. S. A., . (1990). Patterns of first marriage. UN: NY.
MLA
"United Nations International Economic And Social Affairs", "United Nations International Economic And Social Affairs", . Patterns of first marriage. UN: NY. 1990.