Gaya APA
Kirberger, K., Mortensen, C.
(2001).
Teen Love Series: On Friendship
.
Jakarta:
PT Gramedia Pustaka Utama.
Gaya MLA
Kirberger, Kimberlly., Mortensen, Colin.
"Teen Love Series: On Friendship".
Jakarta:
PT Gramedia Pustaka Utama,
2001.
Text.