Cita APA (7a ed.)

Helfrick, A. D. (1991). Electrical spectrum and network analyzers: A practical approach. Academic Press.

Cita Chicago Style (17a ed.)

Helfrick, Albert D. Electrical Spectrum and Network Analyzers: A Practical Approach. San Diego: Academic Press, 1991.

Cita MLA (9a ed.)

Helfrick, Albert D. Electrical Spectrum and Network Analyzers: A Practical Approach. Academic Press, 1991.