APA (7e ed.) Bronvermelding

ebrary, Inc. (1987). Directions in engineering research: An assessment of opportunities and needs. National Academy Press.

Chicago (17e ed.) Bronvermelding

ebrary, Inc. Directions in Engineering Research: An Assessment of Opportunities and Needs. Washington, D.C.: National Academy Press, 1987.

MLA (9e ed.) Bronvermelding

ebrary, Inc. Directions in Engineering Research: An Assessment of Opportunities and Needs. National Academy Press, 1987.