Meloan, Clifton E.
John Wiley & Sons, 1999
Buku Referensi
FleiBer, Marieluise
Munchen Suhrkamp 1979
Buku Teks
Pike, Kenneth L. (Kenneth Lee), 1912-2000, author
Ablex Publishing, 1983
Buku Teks
Rao, K. Sreenivasa, author
Springer, 2012
eBooks
edited by Patricia C. Pothier ; foreword by Margretta M. Styles
Little, Brown and Company, 1980
Buku Teks