Citazione Stile APA (7a Edizione)
Nelson, H. D. (1973). Area handbook for the Democratic Republic of Sudan. For sale by the Supt. of Docs., U.S. Govt. Print. Off.].
Citazione stile Chigago Style (17a edizione)
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.
Citatione 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.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.