HAAS, R. W. (1989). Industrial Marketing Management Text And Cases Robert W. Haas. PWS-Kent.
Lua i Stíl Chicago (17ú heag.)HAAS, Robert W. Industrial Marketing Management Text And Cases Robert W. Haas. PWS-Kent, 1989.
Lua MLA (8ú heag.)HAAS, Robert W. Industrial Marketing Management Text And Cases Robert W. Haas. PWS-Kent, 1989.
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