APA (7th ed.) Citation

Ahlberg, J., & Ahlberg, A. (1983). Peepo! / by Janet & Allan Ahlberg. Puffin.

Chicago Style (17th ed.) Citation

Ahlberg, Janet, and Allan Ahlberg. Peepo! / by Janet & Allan Ahlberg. Harmondsworth: Puffin, 1983.

MLA (9th ed.) Citation

Ahlberg, Janet, and Allan Ahlberg. Peepo! / by Janet & Allan Ahlberg. Puffin, 1983.

Warning: These citations may not always be 100% accurate.