Cita APA (7th ed.)

BLY ROBERT W. (1991). SELLING YOUR SERVICES. HENRY HOLT.

Cita Chicago (17th ed.)

BLY ROBERT W. SELLING YOUR SERVICES. NEW YORK: HENRY HOLT, 1991.

Cita MLA (9th ed.)

BLY ROBERT W. SELLING YOUR SERVICES. HENRY HOLT, 1991.