ৱিকিপিডিয়া:উৎসৰ উল্লেখ: বিভিন্ন সংশোধনসমূহৰ মাজৰ পাৰ্থক্য

{{quotation|{{tick}}By mass, oxygen is the third most abundant element in the universe after hydrogen and helium.<ref>Emsley, John. ''Nature's Building Blocks: An A-Z Guide to the Elements''. Oxford University Press, 2001, p. 297.</ref>}}

 

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