Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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