APA Citation

Siregar, L. S. (2014). Students ability in writing formal letters At grade xii SMK Kampus Padangsidimpuan in 2011-2012 academic year.

Chicago Style Citation

Siregar, Lisma Santi. Students Ability in Writing Formal Letters At Grade Xii SMK Kampus Padangsidimpuan in 2011-2012 Academic Year. 2014.

MLA Citation

Siregar, Lisma Santi. Students Ability in Writing Formal Letters At Grade Xii SMK Kampus Padangsidimpuan in 2011-2012 Academic Year. 2014.

Warning: These citations may not always be 100% accurate.