Roldan, A. S. (2012). Operating and managing a hotel & restaurant business (Revised edition, 2012.). AR Skills Development and Management Services.
Chicago-referens (17:e uppl.)Roldan, Amelia Samson. Operating and Managing a Hotel & Restaurant Business. Revised edition, 2012. Parañaque City: AR Skills Development and Management Services, 2012.
MLA-referens (9:e uppl.)Roldan, Amelia Samson. Operating and Managing a Hotel & Restaurant Business. Revised edition, 2012. AR Skills Development and Management Services, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.