Constantino, V. M., & Mananghaya, R. (2004). An evaluation of the impact of moving customer service online: The e-GSIS experience. University of the Philippines Diliman.
Chicago-referens (17:e uppl.)Constantino, Vilma M., och Rufino Mananghaya. An Evaluation of the Impact of Moving Customer Service Online: The E-GSIS Experience. Quezon City: University of the Philippines Diliman, 2004.
MLA-referens (9:e uppl.)Constantino, Vilma M., och Rufino Mananghaya. An Evaluation of the Impact of Moving Customer Service Online: The E-GSIS Experience. University of the Philippines Diliman, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.