Gaya APA
Difficulties in english teaching-learning activity for 8th grade junior high school in SMP Negeri 4 . (2011).
:
Universitas Sebelas Maret.
Gaya MLA
Difficulties in english teaching-learning activity for 8th grade junior high school in SMP Negeri 4 .
.
:
Universitas Sebelas Maret,
2011.
TA.