Perreault, W. D., & McCarthy, E. J. (1996). Learning aid to use with basic marketing (12th ed.). Irwin.
Lua i Stíl Chicago (17ú heag.)Perreault, William D., agus E. Jerome McCarthy. Learning Aid to Use with Basic Marketing. 12th ed. Homewood, Ill: Irwin, 1996.
Lua MLA (9ú heag.)Perreault, William D., agus E. Jerome McCarthy. Learning Aid to Use with Basic Marketing. 12th ed. Irwin, 1996.
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