Couper, A. D. (1967). The island trade: An analysis of the environment and operation of seaborne trade among three island groups in the Pacific.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCouper, Alastair Dougal. The Island Trade: An Analysis of the Environment and Operation of Seaborne Trade Among Three Island Groups in the Pacific. 1967.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিCouper, Alastair Dougal. The Island Trade: An Analysis of the Environment and Operation of Seaborne Trade Among Three Island Groups in the Pacific. 1967.
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