APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.