Gaya APA

Hoyle, L, H. et al (1989). Managing conventions and group business . East Lansing, Michigan: The Educational Institute of the American Hotel & Motel Association.

Gaya MLA

Hoyle, Leonard, H.. et al. "Managing conventions and group business". East Lansing, Michigan: The Educational Institute of the American Hotel & Motel Association, 1989. BUKU.