APA引文

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

Chicago Style Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.