Gaya APA

Stefanelli, J, M., Feinstein, A, H. (2008). Purchasing : selection and procurement for the hospitality industry (7th ed.). New Jersey: John Wiley and Sons, Inc..

Gaya MLA

Stefanelli, John, M.., Feinstein, Andrew, Hale. "Purchasing : selection and procurement for the hospitality industry". 7th ed. New Jersey: John Wiley and Sons, Inc., 2008. BUKU.