Cita APA (7a ed.)

Parrish, G., & Harper, G. S. (1985). Production gas carburising.

Cita Chicago Style (17a ed.)

Parrish, Geoffrey, y G. S. Harper. Production Gas Carburising. Oxford, ; Pergmon Press, 1985.

Cita MLA (9a ed.)

Parrish, Geoffrey, y G. S. Harper. Production Gas Carburising. 1985.