Gaya APA
Helga, Z.
(2012).
A-Z All About One Direction 100% UnOfficial Book
.
Yogyakarta:
Sinar Kejora.
Gaya MLA
Helga, Zaskia.
"A-Z All About One Direction 100% UnOfficial Book".
Yogyakarta:
Sinar Kejora,
2012.
Nontext.