Citazione APA

London, J., & Remkiewicz, F. (2011). Froggy builds a tree house. Viking.

Stile di citazione Chicago

London, Jonathan, e Frank Remkiewicz. Froggy Builds a Tree House. New York: Viking, 2011.

Citazione MLA

London, Jonathan, e Frank Remkiewicz. Froggy Builds a Tree House. Viking, 2011.