Wibawanti, Frita Dwi and , Drs. H. Maryadi, MA and , Dra. Siti Zuhriah, M. Hum. (2013) A Sociolinguistics Study Of Erotic Register Used In Jakarta Undercover 3 Novel By Moammar Emka. Skripsi thesis, Universitas Muhammadiyah Surakarta.