APA (7th ed.) Citation

Barker, W. G. (1979). Cryptanalysis of an enciphered code problem: Where an "additive" method of encipherment has been used. Aegean Park Press.

Chicago Style (17th ed.) Citation

Barker, Wayne G. Cryptanalysis of an Enciphered Code Problem: Where an "Additive" Method of Encipherment Has Been Used. Laguna Hills, California: Aegean Park Press, 1979.

MLA (9th ed.) Citation

Barker, Wayne G. Cryptanalysis of an Enciphered Code Problem: Where an "Additive" Method of Encipherment Has Been Used. Aegean Park Press, 1979.