APA (7 वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, Wegman, D. H., & McGee, J. (2004). Health and safety needs of older workers. National Academies Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, David H. Wegman, और J. McGee. Health and Safety Needs of Older Workers. Washington, D.C.: National Academies Press, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, et al. Health and Safety Needs of Older Workers. National Academies Press, 2004.
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