Tohutoro APA (7th ed.)
Travis, W. P. (1964). The theory of trade and protection. Harvard Univ..
Tohutoru Kātū Chicago (17th ed.)
Travis, William Penfield. The Theory of Trade and Protection. Cambridge: Harvard Univ., 1964.
Tohutoro MLA (9th ed.)
Travis, William Penfield. The Theory of Trade and Protection. Harvard Univ., 1964.
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