Thompson, Ian
Longman, 1965
Buku Teks
Weber, Max, 1864-1920, author
Beacon Press , 1963
Buku Teks
Grace Kilis, examiner
SAGE, 2013
Buku Teks
Johnstone, Ronald L., author
Prentice-Hall, 1975
Buku Teks
Schraf, Betty R
Tiara Wacana Yogya, 1995
Buku Teks