Makower, M. S., & Williamson, E. (1970). Operational research: Problems, techniques and exercises. Teach Yourself Books.
Lua i Stíl Chicago (17ú heag.)Makower, Michael Stanley, agus E. Williamson. Operational Research: Problems, Techniques and Exercises. London: Teach Yourself Books, 1970.
Lua MLA (9ú heag.)Makower, Michael Stanley, agus E. Williamson. Operational Research: Problems, Techniques and Exercises. Teach Yourself Books, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.