APA (7th ed.) Citation

Harper, W. M. (1979). Operational research (ELBS ed.). English Language Book Society and Macdonald and Evans.

Chicago Style (17th ed.) Citation

Harper, William Massie. Operational Research. ELBS ed. London ; Plymouth: English Language Book Society and Macdonald and Evans, 1979.

MLA (9th ed.) Citation

Harper, William Massie. Operational Research. ELBS ed. English Language Book Society and Macdonald and Evans, 1979.

Warning: These citations may not always be 100% accurate.