Porter, Alan G.
Reading, Mass.: Addison-Wesley, c1985
Buku Teks
Krumm, Robert, author
Prentice-Hal, 1987
Buku Teks
Pilkey, Walter D., author
McGraw-Hill, 1978
Buku Teks
Pollack, Seymour V., author
Holt Rinehart and Winston, 1983
Buku Teks
Ross, C.T.F., author
John Wiley & Sons, 1984
Buku Teks