Παραπομπή APA

Lehmann, D. R. (1997). Analysis for marketing planning/4e. Irwin.

Παραπομπή Chicago Style

Lehmann, Donald R. Analysis for Marketing Planning/4e. London: Irwin, 1997.

Παραπομπή MLA

Lehmann, Donald R. Analysis for Marketing Planning/4e. Irwin, 1997.