APA Citation

Hawking, L., Andang H. Sutopo, Widi Lugina, & Hawking, S. (2009). Kunci rahasia George ke alam semesta. Jakarta: Gramedia.

Chicago Style Citation

Hawking, Lucy, Andang H. Sutopo, Widi Lugina, and Stephen Hawking. Kunci Rahasia George Ke Alam Semesta. Jakarta: Gramedia, 2009.

MLA Citation

Hawking, Lucy, Andang H. Sutopo, Widi Lugina, and Stephen Hawking. Kunci Rahasia George Ke Alam Semesta. Jakarta: Gramedia, 2009.

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