Παραπομπή APA

Hirst,Paul Q. (1976). Social evolution and sociological categories. George Allen & Unwin Ltd.

Παραπομπή Chicago Style

Hirst,Paul Q. Social Evolution and Sociological Categories. Londonq: George Allen & Unwin Ltd, 1976.

Παραπομπή MLA

Hirst,Paul Q. Social Evolution and Sociological Categories. George Allen & Unwin Ltd, 1976.