*Artist to artist : 23 major illustrators talk to children about their art / a cura di Eric Carle e Leo Lionni. - New York : Philomel books, [2007]. - 105 p. : ill. ; 29 cm.

*What difference does it make, Danny? / Helen Young ; pictures by Quentin Blake. - London : A. Deutsch, 1980. - 93 p. : ill. ; 22 cm.