Gaya APA
Nur, I. (2013).
Improving Students’ Speaking Skill Through Snowball Throwing Technique .
Tulungagung:
STAIN Tulungagung.
Gaya MLA
Nur, Inaqotun.
"Improving Students’ Speaking Skill Through Snowball Throwing Technique".
Tulungagung:
STAIN Tulungagung,
2013.
Skripsi.