APA (7th ed.) Citation

Hopkins, E. S., & Bean, E. L. (1966). Water purification control (4th ed.). Williams & Wilkins Co..

Chicago Style (17th ed.) Citation

Hopkins, Edward Scott, and Elwood L. Bean. Water Purification Control. 4th ed. Baltimore: Williams & Wilkins Co., 1966.

MLA (9th ed.) Citation

Hopkins, Edward Scott, and Elwood L. Bean. Water Purification Control. 4th ed. Williams & Wilkins Co., 1966.