Franklin

MLA

Portuguese Guinea: Official Standard Names Approved by the United States Board On Geographic Names. Washington: [U.S. Govt. Print. Off.], 1968.

APA

(1968). Portuguese Guinea: official standard names approved by the United States Board on Geographic Names. Washington: [U.S. Govt. Print. Off.].

Chicago

Portuguese Guinea: Official Standard Names Approved by the United States Board On Geographic Names. Washington: [U.S. Govt. Print. Off.], 1968.