APA (7th ed.) Citation

Levin. (2010). Knack treehouses: A step-by-step guide to designing & building a safe & sound structure. Knack.

Chicago Style (17th ed.) Citation

Levin. Knack Treehouses: A Step-by-step Guide to Designing & Building a Safe & Sound Structure. Guilford, CT: Knack, 2010.

MLA (8th ed.) Citation

Levin. Knack Treehouses: A Step-by-step Guide to Designing & Building a Safe & Sound Structure. Knack, 2010.