Gaya APA
PHILIPS, . (1973).
Electron tubes : transmitting for communication, tubes for r.f.heating, PB2/500 TBW15/125 jilid 1a .
Netherlands:
PHILIPS.
Gaya MLA
PHILIPS, .
"Electron tubes : transmitting for communication, tubes for r.f.heating, PB2/500 TBW15/125 jilid 1a".
Netherlands:
PHILIPS,
1973.
Text.