Gaya APA
Santi, I., Nikodemus, .
(2009).
English For Teens 1
(
Pertama)
.
Yogyakarta:
Andi Offset.
Gaya MLA
Santi, Inez., Nikodemus, .
"English For Teens 1".
Pertama
Yogyakarta:
Andi Offset,
2009.
Text.