Gaya APA

Brain, M., Kusuma, E, Y. (2003). Berapakah Berat Bumi? = How Much Does the Earth Weigh? (Ed.1.; Cet.I). : .

Gaya MLA

Brain, Marshall., Kusuma, Ervina, Yudha. "Berapakah Berat Bumi? = How Much Does the Earth Weigh?". Ed.1.; Cet.I : , 2003. Text.