APA (7th ed.) Citation

Gray, B. F. (1974). Elementary engineering systems / (by) B.F. Gray. Longman.

Chicago Style (17th ed.) Citation

Gray, B. F. Elementary Engineering Systems / (by) B.F. Gray. London: Longman, 1974.

MLA (9th ed.) Citation

Gray, B. F. Elementary Engineering Systems / (by) B.F. Gray. Longman, 1974.

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