Pratt, Scott L
Wiley, 2015
Buku Teks
Richards, Tom, author
Addison-Wesley Pub. Co., 1989
Buku Teks
Jeffrey, Richard, author
McGraw-Hill, 1981
Buku Teks
Salmon, Merrilee H., author
Wadsworth, 2013
Buku Teks
Cohen, Morris R.
Harcourt, Brace & World, Inc., 1934
Buku Teks