Sarah Courtauld. (2019). Owls (First Reading Level 4). Usborne.
Chicago-čujuhus (17. p.)Sarah Courtauld. Owls (First Reading Level 4). Usborne, 2019.
MLA-čujuhus (9. p.)Sarah Courtauld. Owls (First Reading Level 4). Usborne, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.