Παραπομπή σε μορφή APA (7η εκδ.)

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.