en Bureau of Labor Statistics, U.S. Department of Manual Labor (). „Engineers”. Occupational Outlook Handbook, 2006–07 Edition (via Wayback Machine). Arhivat din original la . Accesat în .
en National Society of Professional Engineers (). „Frequently Asked Questions About Engineering”. Arhivat din original la . Accesat în . "Science is knowledge based on our observed facts and tested truths arranged in an orderly system that can be validated and communicated to other people. Engineering is the creative application of scientific principles used to plan, build, direct, guide, manage, or work on systems to maintain and improve our daily lives."
en Bureau of Labor Statistics, U.S. Department of Manual Labor (). „Engineers”. Occupational Outlook Handbook, 2006–07 Edition (via Wayback Machine). Arhivat din original la . Accesat în .
en National Society of Professional Engineers (). „Frequently Asked Questions About Engineering”. Arhivat din original la . Accesat în . "Science is knowledge based on our observed facts and tested truths arranged in an orderly system that can be validated and communicated to other people. Engineering is the creative application of scientific principles used to plan, build, direct, guide, manage, or work on systems to maintain and improve our daily lives."
