Written by Jill Eggleton. (2018). Big hippo and little hippo. 长江少年儿童出版社.
Čikaški stil citiranja (17. izdanje)Written by Jill Eggleton. Big Hippo and Little Hippo. 长江少年儿童出版社, 2018.
MLA način citiranja (8. izdanje)Written by Jill Eggleton. Big Hippo and Little Hippo. 长江少年儿童出版社, 2018.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.