Gaya APA
Agustiani/031111174, P, R. (2017).
Students' Difficulties In Writing Argumentative Essay .
Bogor:
FKIP Unpak.
Gaya MLA
Agustiani/031111174, Putri,Kiki, Rizky.
"Students' Difficulties In Writing Argumentative Essay".
Bogor:
FKIP Unpak,
2017.
Skripsi English.