APA (7th ed.) Citation

Peppé, R. (1978). Humphrey, the number horse: A counting and tables book. Methuen Children's Books.

Chicago Style (17th ed.) Citation

Peppé, Rodney. Humphrey, the Number Horse: A Counting and Tables Book. London: Methuen Children's Books, 1978.

MLA (9th ed.) Citation

Peppé, Rodney. Humphrey, the Number Horse: A Counting and Tables Book. Methuen Children's Books, 1978.