Brain, M. (2003). Berapakah Berat Bumi? Pakar Raya.
Chicago Style (17th ed.) CitationBrain, Marshall. Berapakah Berat Bumi? Pakar Raya, 2003.
MLA (8th ed.) CitationBrain, Marshall. Berapakah Berat Bumi? Pakar Raya, 2003.
Warning: These citations may not always be 100% accurate.