Gaya APA

PHILIPS, . (1974). Electron tubes : voltage stabilizing and reference tubes, counter, selector and indicator tubes, trigger tubes and switching diodes, thyratrons…..jilid 7 . Netherlands: PHILIPS.

Gaya MLA

PHILIPS, . "Electron tubes : voltage stabilizing and reference tubes, counter, selector and indicator tubes, trigger tubes and switching diodes, thyratrons…..jilid 7". Netherlands: PHILIPS, 1974. Text.