APA (7th ed.) Citation

Gray, H. L. (1959). English field systems / by H.L. Gray. Merlin.

Chicago Style (17th ed.) Citation

Gray, H. L. English Field Systems / by H.L. Gray. Merlin, 1959.

MLA (9th ed.) Citation

Gray, H. L. English Field Systems / by H.L. Gray. Merlin, 1959.

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