Group, T. R. R. (1996). Gaya Tarik Bumi. PT Rosda Jayaputra.
Chicago Style (17th ed.) CitationGroup, Tim Redaksi Rosda. Gaya Tarik Bumi. PT Rosda Jayaputra, 1996.
MLA (8th ed.) CitationGroup, Tim Redaksi Rosda. Gaya Tarik Bumi. PT Rosda Jayaputra, 1996.
Warning: These citations may not always be 100% accurate.