APA (7 वां संस्करण) प्रशस्ति पत्र
Grubb, W. N., & Worthen, H. (1999). Honored but invisible: An inside look at teaching in community colleges. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Grubb, W. Norton, और Helena Worthen. Honored but Invisible: An Inside Look at Teaching in Community Colleges. New York: Routledge, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Grubb, W. Norton, और Helena Worthen. Honored but Invisible: An Inside Look at Teaching in Community Colleges. Routledge, 1999.
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