APA Citation

Lukman Hakim, Arif Giyanto, & Umi Farah. (2007). Upgrade yourself. Solo: Era Intermedia.

Chicago Style Citation

Lukman Hakim, Arif Giyanto, and Umi Farah. Upgrade Yourself. Solo: Era Intermedia, 2007.

MLA Citation

Lukman Hakim, Arif Giyanto, and Umi Farah. Upgrade Yourself. Solo: Era Intermedia, 2007.

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