APA
Robortson B.C, Black L.J, . (1957). Electric Circuits and Machines. New York: D,Van Nostrand & Co.
Chicago
Robortson B.C, Black L.J, . 1957. Electric Circuits and Machines. New York: D,Van Nostrand & Co.
Harvard
Robortson B.C, Black L.J, . (1957). Electric Circuits and Machines. New York: D,Van Nostrand & Co.
MLA
Robortson B.C, Black L.J, . Electric Circuits and Machines. New York: D,Van Nostrand & Co. 1957.