Park, Jae Dong
Silkroad sketch
Hangyorae Chulpan, 2007
 Buku Teks
Klaiman, M.H.
Grammatical voice
Cambridge University Press , 1991
 Buku Teks SO
Dozier, Edward P.
Kalinga of Northen Luzon, Philippines / by Edward P. Dozier
Holt, Rinehart and Winston, 1967
 Buku Teks
Cohen, Morris R.
American thought : a critical sketch
Free Press, 1954
 Buku Teks SO
Pott, F.L. Hawks
A sketch of Chinese history
Kelly and Walsh, 1936
 Buku Teks SO