1.
|
New York : Nova Science Publishers, c2011.
|
2.
|
Rotterdam : SensePublishers 2016.
|
3.
|
Rotterdam : SensePublishers, 2015.
|
4.
|
Rotterdam, The Netherlands : Sense Publishers, [2014] ©2014
|
5.
|
Hauppauge, N.Y. : Nova Science Publishers, Inc., 2013.
|
6.
|
Lanham, Md. : Rowman & Littlefield Education, c2009.
|
7.
|
Cham, Switzerland : Palgrave Macmillan, 2021.
|