Gaya APA

Retnawati, H., Betania, V. (2011). Fun Learning Mathematics [1] : For Grade I Elementary School (Ed. 2.--). Bandung: Grafindo Media Pratama.

Gaya MLA

Retnawati, Heri., Betania, Vera. "Fun Learning Mathematics [1] : For Grade I Elementary School". Ed. 2.-- Bandung: Grafindo Media Pratama, 2011. Text.