APA-referens (7:e uppl.)

WOODRUFFE HELEN. (1997). SERVICES MARKETING. MACMILLAN.

Chicago-referens (17:e uppl.)

WOODRUFFE HELEN. SERVICES MARKETING. NEW DELHI: MACMILLAN, 1997.

MLA-referens (9:e uppl.)

WOODRUFFE HELEN. SERVICES MARKETING. MACMILLAN, 1997.