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.
Lua i Stíl Chicago (17ú heag.)Constantino, Vilma M., agus Rufino Mananghaya. An Evaluation of the Impact of Moving Customer Service Online: The E-GSIS Experience. Quezon City: University of the Philippines Diliman, 2004.
Lua MLA (9ú heag.)Constantino, Vilma M., agus Rufino Mananghaya. An Evaluation of the Impact of Moving Customer Service Online: The E-GSIS Experience. University of the Philippines Diliman, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.