Dyfyniad APA

Perkins, G. D. (1971). The principles of electrical science in SI units. English Universities press.

Dyfyniad Arddull Chicago

Perkins, G D. The Principles of Electrical Science in SI Units. London: English Universities press, 1971.

Dyfyniad MLA

Perkins, G D. The Principles of Electrical Science in SI Units. English Universities press, 1971.

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