APA (7 ম সংস্করণ) উদ্ধৃতি

Perras, G. R. (2003). Stepping stones to nowhere: The Aleutian Islands, Alaska, and American military strategy, 1867-1945. UBC Press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Perras, Galen Roger. Stepping Stones to Nowhere: The Aleutian Islands, Alaska, and American Military Strategy, 1867-1945. Vancouver: UBC Press, 2003.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Perras, Galen Roger. Stepping Stones to Nowhere: The Aleutian Islands, Alaska, and American Military Strategy, 1867-1945. UBC Press, 2003.