Terry, Morgan, author
Pearson, 2007
Buku Teks
Smith, Mike (J. Mike), author
Oxford University Press, 1990
Buku Teks
Sheperd, James F., author
Houghton Miffiln, 1983
Buku Teks
Evans, Desmond W., author
Pitman, 1989
Buku Teks
Langan, John, 1942-, author
McGraw-Hill, 2012
Buku Teks