Peg Hall. (2002). "Whose Legs Are These?: A Look at Animal Legs - Kicking, Running, and Hopping (Whose Is It?)". Picture Window Books.
芝加哥风格引文Peg Hall. "Whose Legs Are These?: A Look at Animal Legs - Kicking, Running, and Hopping (Whose Is It?)". Picture Window Books, 2002.
MLA引文Peg Hall. "Whose Legs Are These?: A Look at Animal Legs - Kicking, Running, and Hopping (Whose Is It?)". Picture Window Books, 2002.
警告：这些引文格式不一定是100％准确.