Dyfyniad APA
Cowles, E. L., & Nelson, E. (2015). An introduction to survey research (First edition.). Business Expert Press.
Dyfyniad Arddull Chicago
Cowles, Ernest L., and 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.
Dyfyniad MLA
Cowles, Ernest L., and Edward Nelson. An Introduction to Survey Research. First edition. Business Expert Press, 2015.
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