SCHMOLL JOY FRISCH. (2019). ICE AGE ANIMALS GROUND SLOTHS (2015 Ed.). RAINTREE PUBLISHERS.
芝加哥风格引文SCHMOLL JOY FRISCH. ICE AGE ANIMALS GROUND SLOTHS. 2015 Ed. LONDON: RAINTREE PUBLISHERS, 2019.
MLA引文SCHMOLL JOY FRISCH. ICE AGE ANIMALS GROUND SLOTHS. 2015 Ed. RAINTREE PUBLISHERS, 2019.
警告：这些引文格式不一定是100％准确.