APA Citation

Riwiing. (2007). Harry potter dan Piala Api. Gramedia Pustaka Utama.

Chicago Style Citation

Riwiing. Harry Potter Dan Piala Api. Gramedia Pustaka Utama, 2007.

MLA Citation

Riwiing. Harry Potter Dan Piala Api. Gramedia Pustaka Utama, 2007.

Warning: These citations may not always be 100% accurate.