Kotas, R. (1970). Labour costs in restaurants: A study of labour costs in catering establishments in the Greater London area. Intertext.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kotas, Richard. Labour Costs in Restaurants: A Study of Labour Costs in Catering Establishments in the Greater London Area. London: Intertext, 1970.
Παραπομπή σε μορφή MLA (9th εκδ.)Kotas, Richard. Labour Costs in Restaurants: A Study of Labour Costs in Catering Establishments in the Greater London Area. Intertext, 1970.
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