Gaya APA

Harrvey The Happy Hippo. (2019). : .

Gaya Chicago

Harrvey The Happy Hippo. . : , 2019. Text.

Gaya MLA

Harrvey The Happy Hippo. . : , 2019. Text.

Gaya Turabian

Harrvey The Happy Hippo. : , 2019. Print.