Gaya APA

safikri, N., m.pd, D, H, S, W. (2013). An error analysis on writing a personal letter at the eleventh grade students of SMK Telkom Sandhy Putra West Jakarta in 2012/2013 academic year . [s.i.]: fkip uhamka.

Gaya MLA

safikri, Nurul., m.pd, Drs., H., Susilo, Wardoyo,. "An error analysis on writing a personal letter at the eleventh grade students of SMK Telkom Sandhy Putra West Jakarta in 2012/2013 academic year". [s.i.]: fkip uhamka, 2013. Text.