Heckman, G., & Ingre, D. Thomson engineering guide to web research: 2007-2008.
Cita Chicago (17th ed.)Heckman, Grant, i David Ingre. Thomson Engineering Guide to Web Research: 2007-2008.
Cita MLA (8th ed.)Heckman, Grant, i David Ingre. Thomson Engineering Guide to Web Research: 2007-2008.
Atenció: Aquestes cites poden no estar 100% correctes.