APA (7th ed.) Citation

Riyanto, S. (2009). Gateway: English For Active Communication. Pustaka Pelajar.

Chicago Style (17th ed.) Citation

Riyanto, Slamet. Gateway: English For Active Communication. Pustaka Pelajar, 2009.

MLA (8th ed.) Citation

Riyanto, Slamet. Gateway: English For Active Communication. Pustaka Pelajar, 2009.

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