edited by D. T. Herbert and R. J. Johnston
John Wiley & Sons, 1981
Buku Teks
Taylor, Griffith, author
Methuen, 1951
Buku Teks
Taylor, Griffith, author
Methuen, 1949
Buku Teks
Lefebvre, Henri, author
University of Minnesota Press, 2003
Buku Teks
Carter, Harold, author
Longman, 1990
Buku Teks