APA

Ashley Ray, . (1961). Electrical Estimating. New York: McGraw-Hill.

Chicago

Ashley Ray, . 1961. Electrical Estimating. New York: McGraw-Hill.

Harvard

Ashley Ray, . (1961). Electrical Estimating. New York: McGraw-Hill.

MLA

Ashley Ray, . Electrical Estimating. New York: McGraw-Hill. 1961.