Cita APA (7th ed.)

Richards, J. A. (1983). Analysis of periodically time-varying systems. Springer-Verlag.

Cita Chicago (17th ed.)

Richards, J. A. Analysis of Periodically Time-varying Systems. Berlin, New York: Springer-Verlag, 1983.

Cita MLA (9th ed.)

Richards, J. A. Analysis of Periodically Time-varying Systems. Springer-Verlag, 1983.