l.r, g. (2009). educational research. Pustaka Pelajar.
Chicago Style (17th ed.) Citationl.r, gay. Educational Research. Pustaka Pelajar, 2009.
MLA (8th ed.) Citationl.r, gay. Educational Research. Pustaka Pelajar, 2009.
Warning: These citations may not always be 100% accurate.