Mitchell, Mark L.
Research design explained
Wadsworth and Cengage Learning, 2013
 Buku Teks SO
Kak, Avinash C.
Designing with objects: object-oriented design patterns explained with Stories from Harry Potter
Wiley , 2015
 Buku Teks SO
Lewis, John P.
Statistics explained
Addison-Wesley, 1999
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Drake, W.M.
Cardiology explained
Chapman & Hal, 1997
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Pittenger, David J.
Behavioral research : design and analysis
McGraw-Hill, 2003
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