APA
David William Spitzer, . (1990). Variable Speed Drives Principles and Applications for Energy Cost Savings. North Carolina: I.S.A & INSTITUTE OF MEASUREMENT & COST.
Chicago
David William Spitzer, . 1990. Variable Speed Drives Principles and Applications for Energy Cost Savings. North Carolina: I.S.A & INSTITUTE OF MEASUREMENT & COST.
Harvard
David William Spitzer, . (1990). Variable Speed Drives Principles and Applications for Energy Cost Savings. North Carolina: I.S.A & INSTITUTE OF MEASUREMENT & COST.
MLA
David William Spitzer, . Variable Speed Drives Principles and Applications for Energy Cost Savings. North Carolina: I.S.A & INSTITUTE OF MEASUREMENT & COST. 1990.