APA (7th ed.) Citation

Indrayana, D. (2011). Indonesia optimis. Gramedia.

Chicago Style (17th ed.) Citation

Indrayana, Denny. Indonesia Optimis. Gramedia, 2011.

MLA (8th ed.) Citation

Indrayana, Denny. Indonesia Optimis. Gramedia, 2011.

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