Gaya APA

Kaufhold, J, A., Kaufhold, S, S. (2013). Basic statistics for educational research (2nd ed.). Bloomington: iUniverse LLC.

Gaya MLA

Kaufhold, John, A.., Kaufhold, Sumita, S.. "Basic statistics for educational research". 2nd ed. Bloomington: iUniverse LLC, 2013. Text.