APA (7th ed.) Citation

Janet Ahlberg & Allan Ahlberg. (2011). Peepo! Puffin.

Chicago Style (17th ed.) Citation

Janet Ahlberg and Allan Ahlberg. Peepo! London: Puffin, 2011.

MLA (9th ed.) Citation

Janet Ahlberg and Allan Ahlberg. Peepo! Puffin, 2011.

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