APA

Comfort J. C., Comfort J. C., . (1975). A flexible efficient computer system to answer human questions. Basel: Birkhaeuser.

Chicago

Comfort John C, Comfort John Craig, . 1975. A flexible efficient computer system to answer human questions. Basel: Birkhaeuser.

Harvard

Comfort J. C., Comfort J. C., . (1975). A flexible efficient computer system to answer human questions. Basel: Birkhaeuser.

MLA

Comfort John C, Comfort John Craig, . A flexible efficient computer system to answer human questions. Basel: Birkhaeuser. 1975.