Roberts, Harold S.
University of Hawaii Press, 1970
Buku Teks
Haley, John Owen, author
Edward Elgar Publishing, 2016
Buku Teks
Bullis, L. Harold
Westview Press, 1985
Buku Teks
Bullis, L. Harold
Westview Press, 1985
Buku Teks
Hood, Jack B.
West Publishing, 1990
Buku Teks