APA
International Statistical Institute, .The Sudan fertility survey 1979 Prinicipal report Volume I. : International Statistical Institute.
Chicago
International Statistical Institute, .The Sudan fertility survey 1979 Prinicipal report Volume I. : International Statistical Institute.
Harvard
International Statistical Institute, .The Sudan fertility survey 1979 Prinicipal report Volume I. : International Statistical Institute.
MLA
International Statistical Institute, .: International Statistical Institute. .