Gaya APA

Ellis, R, C., Institute, A, H, &, M, A, E. (1986). Security and loss prevention management . Michigan: Educational Institute of AHMA.

Gaya MLA

Ellis, Raymond, C.., Institute, American, Hotel, &, Motel, Association., Educational. "Security and loss prevention management". Michigan: Educational Institute of AHMA, 1986. BUKU.