Sugalih, M., A., Valkenburgh, V.(1966).The New Model Programmed Course of Elementary Technician Training basic Industrial electricity (Part Two).New York:The Technical Press Ltd.
Gaya MLA
Sugalih, M., A., Valkenburgh, V..The New Model Programmed Course of Elementary Technician Training basic Industrial electricity.Part TwoNew York:The Technical Press Ltd,1966.Text.