APA Style

Barker, W, G. (1978). The History of Codes and Ciphers in The United States Prior To World War 1 . Jakarta]C1000 00716: Gramedia Pustaka Utama.

MLA Style

Barker, Wayne, G.. "The History of Codes and Ciphers in The United States Prior To World War 1". Jakarta]C1000 00716: Gramedia Pustaka Utama, 1978. Text.