Gaya APA

GAY, L. et al (2006). EDUCATIONAL RESEARCH : COMPETENCIES FOR ANALYSIS AND APPLICATIONS (Ed.8). : Pearson Prentice Hall.

Gaya MLA

GAY, L.R. et al. "EDUCATIONAL RESEARCH : COMPETENCIES FOR ANALYSIS AND APPLICATIONS". Ed.8 : Pearson Prentice Hall, 2006. Text.