Russell, T. (2014). Signaling system #7 (Sixth edition.). McGraw-Hill Education.
Chicago Style (17. basım) AtıfRussell, Travis. Signaling System #7. Sixth edition. New York: McGraw-Hill Education, 2014.
MLA (9th ed.) AtıfRussell, Travis. Signaling System #7. Sixth edition. McGraw-Hill Education, 2014.
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