Cita APA (7th ed.)

BRENNAN,E.D. (1995). SALES QUESTION THAT CLOSE THE SALE. AMACOM.

Cita Chicago (17th ed.)

BRENNAN,E.D. SALES QUESTION THAT CLOSE THE SALE. NEW YORK: AMACOM, 1995.

Cita MLA (9th ed.)

BRENNAN,E.D. SALES QUESTION THAT CLOSE THE SALE. AMACOM, 1995.