APA (7th ed.) Citation

Langan. (2011). English Skill with Readings. Gramedia.

Chicago Style (17th ed.) Citation

Langan. English Skill with Readings. Gramedia, 2011.

MLA (8th ed.) Citation

Langan. English Skill with Readings. Gramedia, 2011.

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