Johnson, Allan G., author
Harcourt Brace, 1986
Buku Teks
Hurd, Geoffrey
Routledge , 1973
Buku Teks
Lee, David, author
Routledge, 1995
Buku Teks
Persell, Caroline Hodges, author
Harper & Row, 1984
Buku Teks
Schaefer, Richard T, author
McGraw-Hill, 2011
Buku Teks