Denning, Sir Alfred
Stevens and Sons Limited, 1949
Buku Teks
compiled and edited by Harold Shepherd and Byron D. Sher
Foundation Press, 1960
Buku Teks
Maris, Cees, editor
Springer, 2011
eBooks
Kuhn, Arthur K., author
Macmillan, 1953
Buku Teks
Tsun, Hang TEY, author
LexisNexis, 2011
Buku Teks