edited by William Petersen
Macmillan, 1972
Buku Teks
Thompson, Warren S., author
McGraw-Hill, 1970
Buku Teks
Artikel Jurnal
Deborah R. McFarlane, editor
Jones & Bartlett Learning, 2015
Buku Teks
Zhang, Guoqing, 1950-, author
Foreign Language Press, 2006
Buku Teks