Gaya APA
Kusumastuti, ., Nuraeni, D, N, D, R.
(2009).
3 Sahabat : Misteri aeiou
.
Jakarta:
Erlangga For Kids.
Gaya MLA
Kusumastuti, ., Nuraeni, Danu, Nugraha, Dan, Rani.
"3 Sahabat : Misteri aeiou".
Jakarta:
Erlangga For Kids,
2009.
Book.