Gaya APA

Institute, A, H, &, M, A, E., Coffman, C, D. (1980). Hospitality for sale . Michigan: Educational Institute of AHMA.

Gaya MLA

Institute, American, Hotel, &, Motel, Association., Educational., Coffman, Charles, DeWitt. "Hospitality for sale". Michigan: Educational Institute of AHMA, 1980. BUKU.