Siebert, Eleanor D., author
McGraw-Hill, 1982
Buku Teks
Seese, William S.
Prentice-Hall, 1972
Buku Teks
Waser, Jurg, author
McGraw-Hill, 1980
Buku Teks
Barrow, Gordon M., author
McGraw-Hill, 1981
Buku Teks
Brady, James E., author
John Wiley & Sons, 1982
Buku Teks