एपीए उद्धरण

Gilbert, L., & Gale, V. (2008). Principles of e-learning systems engineering. Chandos Publishing.

शिकागो स्टाइल उद्धरण

Gilbert, Lester, और Veronica Gale. Principles of E-learning Systems Engineering. Oxford: Chandos Publishing, 2008.

एमएलए उद्धरण

Gilbert, Lester, और Veronica Gale. Principles of E-learning Systems Engineering. Chandos Publishing, 2008.