Avery, Thomas Eugene, author
McGraw-Hill, 1975
Buku Teks
Artikel Jurnal
edited by D.W. Pearce with the assistance of J. Rose
Macmillan, 1975
Buku Teks
Qiu, Tian, author
Foreign Language Press, 2007
Buku Teks
Barnes, Richard, author
Portland, 2009
Buku Teks