APA (7th ed.) Citation

Macaulay, D., & Keenan, S. (2012). Castle: How it works. Square Fish/David Macaulay Studio.

Chicago Style (17th ed.) Citation

Macaulay, David, and Sheila Keenan. Castle: How It Works. New York, NY: Square Fish/David Macaulay Studio, 2012.

MLA (8th ed.) Citation

Macaulay, David, and Sheila Keenan. Castle: How It Works. Square Fish/David Macaulay Studio, 2012.

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