APA (7th ed.) Citation

Gunawan, B. D. &. H. (2007). Smart Puzzle for Smart People. Pustaka Widyatama.

Chicago Style (17th ed.) Citation

Gunawan, Budi Djatmiko & Hendri. Smart Puzzle for Smart People. Pustaka Widyatama, 2007.

MLA (8th ed.) Citation

Gunawan, Budi Djatmiko & Hendri. Smart Puzzle for Smart People. Pustaka Widyatama, 2007.

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