APA (7th ed.) Citation

Nelson, H. D. (1972). Area handbook for Chad. For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Chicago Style (17th ed.) Citation

Nelson, Harold D. Area Handbook for Chad. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972.

MLA (8th ed.) Citation

Nelson, Harold D. Area Handbook for Chad. For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972.