Gaya APA
Learning, C.
().
2011-2012 Gale School Catalog
.
Singapura:
Cengage Learning.
Gaya MLA
Learning, Cengage.
"2011-2012 Gale School Catalog".
Singapura:
Cengage Learning,
.
GEN - Bacaan/Seri Non-Fiksi.