Cita APA

Lukman Hakim. (2007). Upgrade Yourself. Surakarta: Era Intermedia.

Chicago Style Citation

Lukman Hakim. Upgrade Yourself. Surakarta: Era Intermedia, 2007.

Cita MLA

Lukman Hakim. Upgrade Yourself. Surakarta: Era Intermedia, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.