Cita APA (7th ed.)

STILL, R. (1988). SALES MANAGEMENT (5TH.). PEARSON.

Cita Chicago (17th ed.)

STILL, RICHARD. SALES MANAGEMENT. 5TH. NEW DELHI: PEARSON, 1988.

Cita MLA (9th ed.)

STILL, RICHARD. SALES MANAGEMENT. 5TH. PEARSON, 1988.