ROHAN BOOK CO. (2001). THINGS YOU WANT TO KNOW EARTH (1st.). ROHAN BOOK CO.
Chicago-viite (17. p.)ROHAN BOOK CO. THINGS YOU WANT TO KNOW EARTH. 1st. DELHI: ROHAN BOOK CO, 2001.
MLA-viite (9. p.)ROHAN BOOK CO. THINGS YOU WANT TO KNOW EARTH. 1st. ROHAN BOOK CO, 2001.
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