Gaya APA
Ford, H.
(2003).
Topik Paling Seru : Ruang Angkasa
.
Jakara:
Erlangga for kids.
Gaya MLA
Ford, Hary.
"Topik Paling Seru : Ruang Angkasa".
Jakara:
Erlangga for kids,
2003.
Text.