John Agard; Grace Nichols. (2010). "Twinkle, Twinkle, Firefly (Collins Big Cat)". HarperCollins UK.
Čikaški stil citiranja (17. izdanje)John Agard; Grace Nichols. "Twinkle, Twinkle, Firefly (Collins Big Cat)". HarperCollins UK, 2010.
MLA način citiranja (9. izdanje)John Agard; Grace Nichols. "Twinkle, Twinkle, Firefly (Collins Big Cat)". HarperCollins UK, 2010.
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