edited by Barry Turner
Macmillan, 1995
Buku Referensi
edited by Barry Turner
Macmillan and The Free Press, 1992
Buku Referensi
edited by Barry Turner
Macmillan, 1992
Buku Referensi
Winterowd, W. Ross
Harcourt Brace Jovanovich, 1981
Buku Teks SO
Wyler, Robert C
Macmillan, 1968
Buku Teks SO