Popham, D., & Popham, S. (2014). Ready For Play!: The story of Metal Head and All-Metal Dolls. Make Mine Metal, LLC.
Lua i Stíl Chicago (17ú heag.)Popham, Donilee, agus Scott Popham. Ready For Play!: The Story of Metal Head and All-Metal Dolls. Coralville?: Make Mine Metal, LLC, 2014.
Lua MLA (8ú heag.)Popham, Donilee, agus Scott Popham. Ready For Play!: The Story of Metal Head and All-Metal Dolls. Make Mine Metal, LLC, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.