Langsrorf, . A. S. (1959). Principal of direct current machines (6th ed.). Mc Graw Hill.
Chicago Style (17. basım) AtıfLangsrorf, Alexander S. Principal of Direct Current Machines. 6th ed. New York: Mc Graw Hill, 1959.
MLA (9th ed.) AtıfLangsrorf, Alexander S. Principal of Direct Current Machines. 6th ed. Mc Graw Hill, 1959.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..