APA (7th ed.) Citation

Agung, G. Step by Step iPhone. elex media komputindo.

Chicago Style (17th ed.) Citation

Agung, Gregorius. Step by Step IPhone. elex media komputindo.

MLA (8th ed.) Citation

Agung, Gregorius. Step by Step IPhone. elex media komputindo.

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