Gaya APA

Jolley, J., Mitchell, M. (1992). Research Design Explained 2nd Ed (2nd ed). United Stated of America: Holt, Rinhart and Winston, Inc.

Gaya MLA

Jolley, Janina., Mitchell, Mark. "Research Design Explained 2nd Ed". 2nd ed United Stated of America: Holt, Rinhart and Winston, Inc, 1992. Text.