Smellie, K.B.
Frederick A. Preager 1955 , 1955
Buku Teks
Oakland, John, author
Routledge , 1992
Buku Teks
Oakland, John, author
London; New York Routledge 1992,
Buku Teks
edited by Peter Childs, Mike Storry
Routledge, 1999
Buku Referensi
Sylvan Press, 1949
Buku Teks