Norman Bridwell. (2011). Clifford's Birthday Party (Clifford 8x8) (Reissue.). Cartwheel Books.
Čikaški stil citiranja (17. izdanje)Norman Bridwell. Clifford's Birthday Party (Clifford 8x8). Reissue. Cartwheel Books, 2011.
MLA način citiranja (9. izdanje)Norman Bridwell. Clifford's Birthday Party (Clifford 8x8). Reissue. Cartwheel Books, 2011.
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