Lowder, J., & Salvatore, R. (2012). Beyond the wall: Exploring George R.R. Martin's A song of ice and fire, from A game of thrones to A dance with Dragons. Smart Pop.

Lowder, James, and R.A Salvatore. Beyond the Wall: Exploring George R.R. Martin's A Song of Ice and Fire, from A Game of Thrones to A Dance with Dragons. Dallas, Texas, USA: Smart Pop, 2012.

Lowder, James, and R.A Salvatore. Beyond the Wall: Exploring George R.R. Martin's A Song of Ice and Fire, from A Game of Thrones to A Dance with Dragons. Smart Pop, 2012.