Singapura Intellectual Puclishing [t.th.]
Buku Referensi
Sigea, Kawamoto
Tpkyp Kodansha 1979
Buku Referensi
Shanghai World Book [t.th.]
Buku Referensi
Beijing Waiyanshe (Foreign Language Teaching and Research Press) 2001
Buku Referensi
New York Funk and Wagnalls Company 1955
Buku Referensi