APA

(1986). Selected demographic and social characteristice of the world's children and youth. New York: United Nations.

Chicago

1986. Selected demographic and social characteristice of the world's children and youth. New York: United Nations.

Harvard

(1986). Selected demographic and social characteristice of the world's children and youth. New York: United Nations.

MLA

Selected demographic and social characteristice of the world's children and youth. New York: United Nations. 1986.