APA-ийн эшлэл(7 дахь хэвлэлт)
ebrary, Inc. (1987). Directions in engineering research: An assessment of opportunities and needs. National Academy Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
ebrary, Inc. Directions in Engineering Research: An Assessment of Opportunities and Needs. Washington, D.C.: National Academy Press, 1987.
MLA -ийн эшлэл (9 дэх хэвлэлт)
ebrary, Inc. Directions in Engineering Research: An Assessment of Opportunities and Needs. National Academy Press, 1987.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.