Gaya APA
Widmark, M.
(2002).
Billy and Maya's Detective Agency :The Hotel Mystery
(
Cet.9)
.
Jakarta:
Penerbit Erlangga.
Gaya MLA
Widmark, Martin.
"Billy and Maya's Detective Agency :The Hotel Mystery".
Cet.9
Jakarta:
Penerbit Erlangga,
2002.
Text.