Gaya APA

Abbey, J, R., Institute, A, H, &, M, A, E. (1989). Hospitality sales and advertising . Michigan: Educational Institute of AHMA.

Gaya MLA

Abbey, James, R.., Institute, American, Hotel, &, Motel, Association., Educational. "Hospitality sales and advertising". Michigan: Educational Institute of AHMA, 1989. BUKU.