Nehrt, Lee Charles
International Textbook, 1967
Buku Teks
Nehrt, Lee Charles
Intext Educational, 1972
Buku Teks
Shapiro, Alan C.
Prentice-Hall, 1998
Buku Teks
Shapiro, Alan C.
John Wiley & Sons, 2003
Buku Teks
Shapiro, Alan C.
Prentice-Hall, 1998
Buku Teks