Peg Hall. (2002). "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books.
Chicago-referens (17:e uppl.)Peg Hall. "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books, 2002.
MLA-referens (9:e uppl.)Peg Hall. "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.