Huff, Toby E., 1942-
Cambridge University Press , 1995
Buku Teks
Hsu, Immanuel C.Y.
Oxford University Press, 1970
Buku Teks
Hsu, Immanuel C.Y.
New York Oxford University Press 1995,
Buku Teks
Alfred J. Rieber
Cambridge University Press, 2014
eBooks
Thomson, Ian
John Murray, 1957, 1960
Buku Teks