Gaya APA

kratsas, , G, , ;, T, J., wardoyo,m.pd, D. (2009). An Error Analysis on Writing a Personal Letter at The Sixth Grade SDIT Asy-Syukriyyah. . Jakarta: UHAMKA.

Gaya MLA

kratsas, , Georges, , ;, Truby,, Jon., wardoyo,m.pd, Drs.susilo. "An Error Analysis on Writing a Personal Letter at The Sixth Grade SDIT Asy-Syukriyyah.". Jakarta: UHAMKA, 2009. Text.