APA (7th ed.) Citation

Sømme, L., & Kalas, S. (1988). The penguin family book. Picture Book Studio.

Chicago Style (17th ed.) Citation

Sømme, Lauritz, and Sybille Kalas. The Penguin Family Book. Saxonville, Mass.: Picture Book Studio, 1988.

MLA (9th ed.) Citation

Sømme, Lauritz, and Sybille Kalas. The Penguin Family Book. Picture Book Studio, 1988.

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