Cita APA (7th ed.)

FORSYTH PATRICK. (1999). MARKETING PROFESSIONAL SERVICES (2ND.). KOGAN PAGE.

Cita Chicago (17th ed.)

FORSYTH PATRICK. MARKETING PROFESSIONAL SERVICES. 2ND. LONDON: KOGAN PAGE, 1999.

Cita MLA (9th ed.)

FORSYTH PATRICK. MARKETING PROFESSIONAL SERVICES. 2ND. KOGAN PAGE, 1999.