Collins, Jim, author
Routledge, 1989
Buku Teks
Lee, Sung-hwan, 1956-, author
Purun Sup, 2004
Buku Teks
Tosti, Antonella, editor
Springer, 2012
eBooks
Dow, Gwyneth M.
Pergamon Press, 1971
Buku Teks
Hoover, Herbert, 1874-1964, author
William Monrow, 1962
Buku Teks