by Thomas R. Howell ... [and others]
Westview Press, 1988
Buku Teks
Parker, Harry, author
John Wiley & Sons, 1983
Buku Teks
Spiegel, Leonard, author
Regents, 1993
Buku Teks
edited by Roger L. Brockenbrough, Frederick S. Merrit
McGraw-Hill, 2011
Buku Teks
Bowles, Joseph E., author
McGraw-Hill, 1987
Buku Teks