APA (7th ed.) Citation

Douglas, J. (1959). Hydroponics: The bengal system. (4th ed.). 0.U.Pr..

Chicago Style (17th ed.) Citation

Douglas, J.Sholto. Hydroponics: The Bengal System. 4th ed. Bombay: 0.U.Pr., 1959.

MLA (9th ed.) Citation

Douglas, J.Sholto. Hydroponics: The Bengal System. 4th ed. 0.U.Pr., 1959.