Silva, D. L. (1999). Design, development and evaluation of a web-based interactive multimedia courseware in analytic geometry (http: //members.aol.com/dlsilva1/index). Animo Repository.
استشهاد بنمط شيكاغوSilva, Dante L. Design, Development and Evaluation of a Web-based Interactive Multimedia Courseware in Analytic Geometry (http: //members.aol.com/dlsilva1/index). Animo Repository, 1999.
MLA استشهادSilva, Dante L. Design, Development and Evaluation of a Web-based Interactive Multimedia Courseware in Analytic Geometry (http: //members.aol.com/dlsilva1/index). Animo Repository, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.