APA

Department Of Economics And Social Affairs - Statistics Division, .Statistical Yearbook:Forty-Fourth Issue. New York: United Nations.

Chicago

Department Of Economics And Social Affairs - Statistics Division, .Statistical Yearbook:Forty-Fourth Issue. New York: United Nations.

Harvard

Department Of Economics And Social Affairs - Statistics Division, .Statistical Yearbook:Forty-Fourth Issue. New York: United Nations.

MLA

Department Of Economics And Social Affairs - Statistics Division, .New York: United Nations. .