Jastrow, Robert, author
John Wiley & Sons, 1977
Buku Teks
Arny, Thomas T., author
McGraw-Hill, Higher Education, 2004
Buku Teks
Huffer, Charles M.
Holt Rinehart & Winston, 1967
Buku Teks
Wyatt, Stanley P.
Allyn and Bacon, 1971
Buku Teks
Hodge, Paul W.
McGraw-Hill, 1974
Buku Teks