Παραπομπή APA

Wells, L. (1972). The product life cyle and nternational trade. Havard: President and Fellows of Havard College.

Παραπομπή Chicago Style

Wells, Louis. The Product Life Cyle and Nternational Trade. Havard: President and Fellows of Havard College, 1972.

Παραπομπή MLA

Wells, Louis. The Product Life Cyle and Nternational Trade. Havard: President and Fellows of Havard College, 1972.

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