APA (7th ed.) Citation

Heyboer, J. P., & Zijlstra, P. (1951). Transmitting valves. The use of pentodes, tetrodes and triodes in transmitter circuits. Technical library.

Chicago Style (17th ed.) Citation

Heyboer, J. P., and Pieter Zijlstra. Transmitting Valves. The Use of Pentodes, Tetrodes and Triodes in Transmitter Circuits. Netherlands: Technical library, 1951.

MLA (9th ed.) Citation

Heyboer, J. P., and Pieter Zijlstra. Transmitting Valves. The Use of Pentodes, Tetrodes and Triodes in Transmitter Circuits. Technical library, 1951.

Warning: These citations may not always be 100% accurate.