Rangkuti, Bahrum
Kedutaan Pakistan, [date of publication not identified]
Buku Teks SO
Dahl, Roald
Penguin Books, 1984
Buku Teks SO
Ha, Tae Hung
Yonsei University Press, 1975
Buku Teks SO
Ha, Tae Hung
Yonsei University Press, 1986
Buku Teks SO
R.B. Slametmuljana
Wolters, 1952
Buku Teks SO