Frey, James H., author
Sage Publications, 1983
Buku Referensi
Smith, Joan Macfarlance
Routledge & K. Paul, 1972
Buku Teks
Sabine Hader, Michael Hader, Mike Kuhne, editors
[Springer, Springer], 2012
eBooks
Marcel Das, Peter Ester, Lars Kaczmirek, editor
Routledge, 2011
Buku Teks
Lior Gideon
Springer Science, 2012
eBooks