Puchstein, A. F., Lloyd, T. C., & Conrad, A. G. (1954). Alternating-current machines (3d. ed.). John Wiley & sons.
Cita Chicago (17th ed.)Puchstein, Albert Frederick, T. C. Lloyd, i A. G. Conrad. Alternating-current Machines. 3d. ed. New York: John Wiley & sons, 1954.
Cita MLA (8th ed.)Puchstein, Albert Frederick, et al. Alternating-current Machines. 3d. ed. John Wiley & sons, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.