Peg Hall. (2002). "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books.
Chicago-viite (17. p.)Peg Hall. "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books, 2002.
MLA-viite (9. p.)Peg Hall. "Whose Nose Is This?: A Look at Beaks, Snouts, and Trunks (Whose Is It?)". Picture Window Books, 2002.
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