Παραπομπή APA

Bull, G. M. (1980). Darmouth time-sharing system. Ellis Horwood.

Παραπομπή Chicago Style

Bull, Gordon M. Darmouth Time-sharing System. London: Ellis Horwood, 1980.

Παραπομπή MLA

Bull, Gordon M. Darmouth Time-sharing System. Ellis Horwood, 1980.