Lua APA (7ú heag.)

FUTRELL, C. (1991). Sales Management. The Dryden.

Lua i Stíl Chicago (17ú heag.)

FUTRELL, Charles. Sales Management. The Dryden, 1991.

Lua MLA (8ú heag.)

FUTRELL, Charles. Sales Management. The Dryden, 1991.

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