APA

National Carbon Company I., . (1948). Carbones proyectores. : National Carbon Company.

Chicago

National Carbon Company Inc, . 1948. Carbones proyectores. : National Carbon Company.

Harvard

National Carbon Company I., . (1948). Carbones proyectores. : National Carbon Company.

MLA

National Carbon Company Inc, . Carbones proyectores. : National Carbon Company. 1948.