Biswas, N. N. (1964). Principles of telegraphy. Media promoters & Publishers.
Chicago Style (17th ed.) ZitazioaBiswas, Nripendra N. Principles of Telegraphy. New Delhi: Media promoters & Publishers, 1964.
MLA (9th ed.) ZitazioaBiswas, Nripendra N. Principles of Telegraphy. Media promoters & Publishers, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.