Cita APA (7a ed.)
Nelson, H. D. (1973). Area handbook for the Democratic Republic of Sudan. For sale by the Supt. of Docs., U.S. Govt. Print. Off.].
Cita Chicago Style (17a ed.)
Nelson, Harold D. Area Handbook for the Democratic Republic of Sudan. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1973.
Cita MLA (9a ed.)
Nelson, Harold D. Area Handbook for the Democratic Republic of Sudan. For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1973.
Precaución: Estas citas no son 100% exactas.