APA (7th ed.) Citation

Roder, H. (1932). Amplitude, phase, and frequency modulation. Proceedings of the IRE, 20, 884. https://doi.org/10.1109/JRPROC.1932.227697

Chicago Style (17th ed.) Citation

Roder, H. "Amplitude, Phase, and Frequency Modulation." Proceedings of the IRE 20 (1932): 884. https://doi.org/10.1109/JRPROC.1932.227697.

MLA (9th ed.) Citation

Roder, H. "Amplitude, Phase, and Frequency Modulation." Proceedings of the IRE, vol. 20, 1932, p. 884, https://doi.org/10.1109/JRPROC.1932.227697.