Spaventa, Lou J., author
McGraw-Hill, 2001
Buku Teks
Presley, John W., author
Holt, Rinehart and Winston, 1980
Buku Teks
Cambridge University Press, 2007
eBooks
Langan, John, 1942-, author
McGraw-Hill, 2001
Buku Teks
Menzel, Donald H., author
McGraw-Hill, 1961
Buku Teks