Arny, Thomas T.
McGraw-Hill, Higher Education, 2004
Buku Teks
Hodge, Paul W.
McGraw-Hill, 1974
Buku Teks
Hartman, William K.
Wadswoth, 1978
Buku Teks
Moche, Dinah L.
John Wiley & Sons, 1981
Buku Teks
Huffer, Charles M.
Holt Rinehart & Winston, 1967
Buku Teks