The Council on Hotel, Restaurant and Institutional Education (CHRIE)
John Willey & Sons, 1995
Buku Referensi
edited by Metin Kozak, Nazmi Kozak
Emerald, 2016
eBooks
edited by William Ellet
Harvard Business School Publishing, 1997
Buku Referensi
Reynolds, John I.
International Labour Office, 1980
Buku Teks
Tobin, Daniel R., 1946-
American Management Association, 2008
eBooks