Sugalih, M., A., Valkenburgh, V.(1954).The New Model Illustrated Course of Elementary Technician Training basis electricity in five Part one .New York:The Technical Press Ltd.
Gaya MLA
Sugalih, M., A., Valkenburgh, V..The New Model Illustrated Course of Elementary Technician Training basis electricity in five Part one.New York:The Technical Press Ltd,1954.Text.