Παραπομπή APA

Speight, H. (1970). Economics and industrial efficiency/3e (3rd ed.). Macmillan.

Παραπομπή Chicago Style

Speight, H. Economics and Industrial Efficiency/3e. 3rd ed. London: Macmillan, 1970.

Παραπομπή MLA

Speight, H. Economics and Industrial Efficiency/3e. 3rd ed. Macmillan, 1970.