APA Style

Martin, Bill, Everitt, Betsy. (1992). The Happy Hippopotami . : Houghton Mifflin Harcourt.

Chicago Style

Martin, Bill, Everitt, Betsy. The Happy Hippopotami. : Houghton Mifflin Harcourt, 1992. Text Book.

MLA Style

Martin, Bill, Everitt, Betsy. The Happy Hippopotami. : Houghton Mifflin Harcourt, 1992. Text Book.

Turabian Style

Martin, Bill, Everitt, Betsy. The Happy Hippopotami. : Houghton Mifflin Harcourt, 1992. Text Book.