APA (7th ed.) Citation

Yuningsih, Y., & Wardani, S. (2008). Happy With English. Era Pustaka Utama.

Chicago Style (17th ed.) Citation

Yuningsih, Yuyun, and Susilo Wardani. Happy With English. Era Pustaka Utama, 2008.

MLA (8th ed.) Citation

Yuningsih, Yuyun, and Susilo Wardani. Happy With English. Era Pustaka Utama, 2008.

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