Perkins, G. D. (1971). The principles of electrical science in SI units. English Universities press.
Čikaški stil citiranjaPerkins, G D. The Principles of Electrical Science in SI Units. London: English Universities press, 1971.
MLA način citiranjaPerkins, G D. The Principles of Electrical Science in SI Units. English Universities press, 1971.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.