Kristi L. Koenig, Carl H. Schultz.
Cambridge University Press , 2016
Buku Teks
David E. Hogan, editor; Jonathan L. Burstein, editor
J.B. Lippincott, 2002
Buku Teks
Cambridge University Press, 2016
eBooks
Lennquist, Sten, editor
Springer, 2012
eBooks
Rajesh Arora, Preeti Arora.
UK CABI, 2013
Buku Teks