SCHMOLL JOY FRISCH. (2019). ICE AGE ANIMALS GROUND SLOTHS (2015 Ed.). RAINTREE PUBLISHERS.
Čikaški stil citiranja (17. izdanje)SCHMOLL JOY FRISCH. ICE AGE ANIMALS GROUND SLOTHS. 2015 Ed. LONDON: RAINTREE PUBLISHERS, 2019.
MLA način citiranja (9. izdanje)SCHMOLL JOY FRISCH. ICE AGE ANIMALS GROUND SLOTHS. 2015 Ed. RAINTREE PUBLISHERS, 2019.
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