Ryff, P. F. (1994). Electric machinery (2nd ed.). Englewood Cliffs, N.J.: Prentice Hall Career and Technology.
Παραπομπή Chicago StyleRyff, Peter F. Electric Machinery. 2nd ed. Englewood Cliffs, N.J.: Prentice Hall Career and Technology, 1994.
Παραπομπή MLARyff, Peter F. Electric Machinery. 2nd ed. Englewood Cliffs, N.J.: Prentice Hall Career and Technology, 1994.
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