Παραπομπή APA

Ridley, B. K. (1995). Time, space, and things (3rd ed.). Cambridge University Press.

Παραπομπή Chicago Style

Ridley, B. K. Time, Space, and Things. 3rd ed. Cambridge ; New York: Cambridge University Press, 1995.

Παραπομπή MLA

Ridley, B. K. Time, Space, and Things. 3rd ed. Cambridge University Press, 1995.