Gaya APA
Yuan, L.
(2010).
Science 2A: Activiy Book
(
2A SD International Edition)
.
Singapore:
Marshall Cavendish, 2003.
Gaya MLA
Yuan, Ling.
"Science 2A: Activiy Book".
2A SD International Edition
Singapore:
Marshall Cavendish, 2003,
2010.
.