Kaiser, Edward John, author
University of Illinois Press, 1995
Buku Teks
Chapin, F. Stuart (Francis Stuart), 1916-, author
University of Illinois Press, 1979
Buku Teks
Porterfield, Gerald A., author
McGraw-Hill, c1995
Buku Teks
Levy, John M., author
Pearson Education International, 2009
Buku Teks
Levy, John M., author
Routledge, 2013
Buku Teks