Παραπομπή APA

Ridely, B. (1976). Time,space & things (3rd ed.). Cambridge University Press.

Παραπομπή Chicago Style

Ridely, B.K. Time,space & Things. 3rd ed. cambridge: Cambridge University Press, 1976.

Παραπομπή MLA

Ridely, B.K. Time,space & Things. 3rd ed. Cambridge University Press, 1976.