Gaya APA

Creswell, J, W. (2008). Educational research: planning conducting, and evaluating, quantitative and qualitative research (3rd ed). New Jersey: Person: Merrill Prentce Hall.

Gaya MLA

Creswell, John, W.. "Educational research: planning conducting, and evaluating, quantitative and qualitative research". 3rd ed New Jersey: Person: Merrill Prentce Hall, 2008. Text.