Spitzer, D. W. (2012). Variable speed drives: Principles and applications for energy cost savings (4th ed.). Momentum Press.
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Chicago-čujuhus (17. p.)
Spitzer, David W. Variable Speed Drives: Principles and Applications for Energy Cost Savings. 4th ed. [New York, N.Y.] (222 East 46th Street, New York, NY 10017): Momentum Press, 2012.
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MLA-čujuhus (9. p.)
Spitzer, David W. Variable Speed Drives: Principles and Applications for Energy Cost Savings. 4th ed. Momentum Press, 2012.
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