Παραπομπή σε μορφή APA (7η εκδ.)

STEINMETZ LAWRENCE L. (2006). HOW TO SELL AT MARGINS HIGHER THAN YOUR COMPETITORS. JOHN WILEY & SONS.

Παραπομπή σε μορφή Chicago (17η εκδ.)

STEINMETZ LAWRENCE L. HOW TO SELL AT MARGINS HIGHER THAN YOUR COMPETITORS. NEW JERSEY: JOHN WILEY & SONS, 2006.

Παραπομπή σε μορφή MLA (9th εκδ.)

STEINMETZ LAWRENCE L. HOW TO SELL AT MARGINS HIGHER THAN YOUR COMPETITORS. JOHN WILEY & SONS, 2006.