Yang, Jongsung, author
Jimoondang International, 2003
Buku Teks
Clark, Michael, author
Prentice-Hall, 1995
Buku Teks
Greenfield, Jeanette
Cambridge University Press , 1995
Buku Teks
Parents' Magazine's Cultural Institute, 1965
Buku Referensi
Nabila Drishti Kanya, author
2013
UI - Skripsi (Membership)