Gaya APA

Hariyanto, D., Hardiyanto, R. (2003). English grammar for general application (Cet. 1). Surabaya: Gitamedia Press.

Gaya MLA

Hariyanto, Dony., Hardiyanto, Rudy. "English grammar for general application". Cet. 1 Surabaya: Gitamedia Press, 2003. Text.