APA (7th ed.) Citation

Nelson, H. D. (1973). Area handbook for the Democratic Republic of Sudan. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Nelson, Harold D. Area Handbook for the Democratic Republic of Sudan. Washington, D.C: U.S. Government Printing Office, 1973.

MLA (9th ed.) Citation

Nelson, Harold D. Area Handbook for the Democratic Republic of Sudan. U.S. Government Printing Office, 1973.