Catherine Hapka. (2013). Pony Scouts: Blue Ribbon Day (I Can Read Level 2) (I Can Read Book 2.). HarperCollins.
Čikaški stil citiranja (17. izdanje)Catherine Hapka. Pony Scouts: Blue Ribbon Day (I Can Read Level 2). I Can Read Book 2. HarperCollins, 2013.
MLA način citiranja (9. izdanje)Catherine Hapka. Pony Scouts: Blue Ribbon Day (I Can Read Level 2). I Can Read Book 2. HarperCollins, 2013.
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