1. Social Cognitive Theory;Bandura,1989
2. BPHN (Badan Pembinaan Hukum Nasional) [National Law Development Agency]. 1956. Retrieved January 20, 2019 from http://jdihn.bphn.go.id/detail/3511/PELAKSANAAN-UNDANG-UNDANG-TENTANG-PERSETUJUAN-PERJANJIAN-ANTARA-REPUBLIK-INDONESIA-DAN-REPUBLIK-RAKYAT-TIONGKOK-MENGENAI-SOAL-DWIKEWARGA-NEGARAAN-(UNDANG-UNDANG-NO.-2-TAHUN-1958,-LEMBARAN-NEGARA-1958-NO.-5)
3. Community Languages
4. Dynamics of Language Contact