APA (7e ed.) Bronvermelding
ebrary, Inc, Bass, S. A., & Weiss, R. S. (2002). Challenges of the third age: Meaning and purpose in later life. Oxford University Press.
Chicago (17e ed.) Bronvermelding
ebrary, Inc, Scott A. Bass, en Robert Stuart Weiss. Challenges of the Third Age: Meaning and Purpose in Later Life. Oxford [England] ; New York: Oxford University Press, 2002.
MLA (9e ed.) Bronvermelding
ebrary, Inc, et al. Challenges of the Third Age: Meaning and Purpose in Later Life. Oxford University Press, 2002.
Let op: Deze citaties zijn niet altijd 100% accuraat.