APA Format
47572. (2001). Guide to professional & businedd correspondence (Inggris-Indonesia). Jakarta : PPM
MLA Format
47572. Guide to professional & businedd correspondence (Inggris-Indonesia). Jakarta : PPM, 2001
Chicago Format
47572. Guide to professional & businedd correspondence (Inggris-Indonesia). Jakarta : PPM, 2001
Australian/Harvard Format
47572. 2001. Guide to professional & businedd correspondence (Inggris-Indonesia). PPM Jakarta