Παραπομπή APA

Houlden, B. (1962). Some techniques of operational research. The English Universities.

Παραπομπή Chicago Style

Houlden, B.T. Some Techniques of Operational Research. London: The English Universities, 1962.

Παραπομπή MLA

Houlden, B.T. Some Techniques of Operational Research. The English Universities, 1962.