Gaya APA

Hayter, R., Swanson, C, P. (NULL). Careers and training in hotels, catering and tourism . London:: London: Butterworth Heinemann; 1993.

Gaya MLA

Hayter, Roy., Swanson, Carl, P.. "Careers and training in hotels, catering and tourism". London:: London: Butterworth Heinemann; 1993, NULL. Text.