Pilar de-Luis, Estrella Bernal, Maria-Jose Vela and Manuela Perez
International Business Management 4 ( 4 ): 229 - 238 , 2010
Estrella Bernal
International Business Management 5 ( 2 ): 58 - 65 , 2011
Research Journal of Applied Sciences 6 ( 4 ): 223 - 231 , 2011