Gaya APA
Retnawati, H. et al (2010).
Fun Learning Mathematics 1 for Grade I Elemntary School : Student's Book (1).
Bandung:
Grafindo.
Gaya MLA
Retnawati, Heri. et al.
"Fun Learning Mathematics 1 for Grade I Elemntary School : Student's Book".
1
Bandung:
Grafindo,
2010.
Text.