APA-viite (7. p.)
ebrary, Inc, Johnston, D., & Zimmermann, R. (2002). Unjustified enrichment: Key issues in comparative perspective. Cambridge University Press.
Chicago-viite (17. p.)
ebrary, Inc, David Johnston, ja Reinhard Zimmermann. Unjustified Enrichment: Key Issues in Comparative Perspective. Cambridge, U.K. ; New York: Cambridge University Press, 2002.
MLA-viite (9. p.)
ebrary, Inc, et al. Unjustified Enrichment: Key Issues in Comparative Perspective. Cambridge University Press, 2002.
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