Witherell, J. W. (1973). French-speaking central Africa: A guide to official publications in American libraries. General Reference and Bibliography Division, Library of Congress; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWitherell, Julian W. French-speaking Central Africa: A Guide to Official Publications in American Libraries. Washington: General Reference and Bibliography Division, Library of Congress; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1973.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিWitherell, Julian W. French-speaking Central Africa: A Guide to Official Publications in American Libraries. General Reference and Bibliography Division, Library of Congress; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1973.