Boehm, E.A.
Longman Chesire, 1979
Buku Teks
Ohkawa, Kazushi
Stanford University Press, 1973
Buku Teks
Ohkawa, Kazushi
Stanford University Press, 1973
Buku Teks
Shaw, Alan George Lewers
Longman, Green, 1955
Buku Teks
edited, Carole Ferrier
University of Queensland Press, 1986
Buku Teks