APA Style

Hakim, L, N. (1991). Metode analisa kriptogram pendek sistem four part homophonic susstitution . Jakarta: Akademi Sandi Negara.

MLA Style

Hakim, Lukman, Nul. "Metode analisa kriptogram pendek sistem four part homophonic susstitution". Jakarta: Akademi Sandi Negara, 1991. Text.