Hughes,David. (1995). Riwayat alam semesta. U-text.
Chicago Style (17th ed.) CitationHughes,David. Riwayat Alam Semesta. Selangor: U-text, 1995.
MLA (9th ed.) CitationHughes,David. Riwayat Alam Semesta. U-text, 1995.
Warning: These citations may not always be 100% accurate.