APA-viite (7. p.)
Cowles, E. L., & Nelson, E. (2015). An introduction to survey research (First edition.). Business Expert Press.
Chicago-viite (17. p.)
Cowles, Ernest L., ja Edward Nelson. An Introduction to Survey Research. First edition. New York, New York (222 East 46th Street, New York, NY 10017): Business Expert Press, 2015.
MLA-viite (9. p.)
Cowles, Ernest L., ja Edward Nelson. An Introduction to Survey Research. First edition. Business Expert Press, 2015.
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