Cita APA (7a ed.)

Porter, A. W. (1950). Introduction to servomechanisms. Methuen.

Cita Chicago Style (17a ed.)

Porter, Alfred W. Introduction to Servomechanisms. London: Methuen, 1950.

Cita MLA (8a ed.)

Porter, Alfred W. Introduction to Servomechanisms. Methuen, 1950.