Παραπομπή APA

Denyer, J. (1976). O & M and management services: A practical guide. English Language Society.

Παραπομπή Chicago Style

Denyer, J.C. O & M and Management Services: A Practical Guide. London: English Language Society, 1976.

Παραπομπή MLA

Denyer, J.C. O & M and Management Services: A Practical Guide. English Language Society, 1976.