GIFFFORD CLIVE. (2019). HOW THE WORLD WORKS (2013 Ed.). KINGFISHER BOOKS LTD.
Chicago-čujuhus (17. p.)GIFFFORD CLIVE. HOW THE WORLD WORKS. 2013 Ed. LONDON: KINGFISHER BOOKS LTD, 2019.
MLA-čujuhus (9. p.)GIFFFORD CLIVE. HOW THE WORLD WORKS. 2013 Ed. KINGFISHER BOOKS LTD, 2019.
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