edited by Marcelo Dascal, Dietfried Gerhardus, Kuno Lorenz and Georg Meggle
Walter de Gruyter, 1992
Buku Referensi
edited by Marcelo Dascal, Dietfired Gerhardus, Kuno Lorenz and Georg Meggle
Walter de Gruyter, 1996
Buku Referensi
Lamarque, Peter, author
Blackwell Publishing, 2009
Buku Teks
Sober, Elliott, author
Westview Press, 1993
Buku Teks
Hick, John H., 1922-2012, author
Prentice-Hall, 1990
Buku Teks