Yuen, Ren Chao
Harvard University Press, 1962
Buku Referensi
Halliday, M.A.K.
Oxford University Press, 1989
Buku Teks
Cambridge University Press, 2007
eBooks
Yuen, Ren Chao
University of California Press, 1968
Buku Teks
Underhill, Nic
Cambridge University Press, 1993
Buku Teks