Shepherd, J., Morton, A. H., & Spence, L. F. (1958). Higher electrical engineering: A textbook for students in higher National Certificate courses. London: Pitman Paperbacks.
Παραπομπή Chicago StyleShepherd, J., A. H. Morton, and L. F. Spence. Higher Electrical Engineering: A Textbook for Students in Higher National Certificate Courses. London: Pitman Paperbacks, 1958.
Παραπομπή MLAShepherd, J., A. H. Morton, and L. F. Spence. Higher Electrical Engineering: A Textbook for Students in Higher National Certificate Courses. London: Pitman Paperbacks, 1958.
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