Cita APA (7a ed.)

National Cash Register Company (Dayton, Ohio). Technical Education Department. (1978). NCR data communications concepts (Rev.). E & L Instruments.

Cita Chicago Style (17a ed.)

National Cash Register Company (Dayton, Ohio). Technical Education Department. NCR Data Communications Concepts. Rev. Derby, Conn: E & L Instruments, 1978.

Cita MLA (9a ed.)

National Cash Register Company (Dayton, Ohio). Technical Education Department. NCR Data Communications Concepts. Rev. E & L Instruments, 1978.