Kirkpatrick, Lee A., author
Wadsworth and Cengage Learning, 2011
Buku Teks
Wolfgang Gaul, Andreas Geyer-Schulz, Lars Schmidt-Theieme, Jonas Kunze, editors
[Springer, Springer], 2012
eBooks
Snell, E. J., author
Chapman and Hall, 1991
Buku Referensi
Digby, Pete
Clarendon Press , 1989
Buku Teks
Gear, C. William (Charles William), 1935-, author
1978
Buku Teks