APA (7th ed.) Citation

Dhirgantoro, D. (2013). 2 (Dua). Gramedia Widisarana Indonesia.

Chicago Style (17th ed.) Citation

Dhirgantoro, Donny. 2 (Dua). Gramedia Widisarana Indonesia, 2013.

MLA (8th ed.) Citation

Dhirgantoro, Donny. 2 (Dua). Gramedia Widisarana Indonesia, 2013.

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