APA (7th ed.) Citation

Callen, S., & Guthridge, B. (2014). This is the tower that Frank built. Teacher Created Materials.

Chicago Style (17th ed.) Citation

Callen, Sharon, and Bettina Guthridge. This Is the Tower That Frank Built. Huntington Beach, CA: Teacher Created Materials, 2014.

MLA (9th ed.) Citation

Callen, Sharon, and Bettina Guthridge. This Is the Tower That Frank Built. Teacher Created Materials, 2014.