Judy Hawes. (2000). Why Frogs Are Wet (Let's-Read-and-Find-Out Science 2). HarperCollins.
芝加哥风格引文Judy Hawes. Why Frogs Are Wet (Let's-Read-and-Find-Out Science 2). HarperCollins, 2000.
MLA引文Judy Hawes. Why Frogs Are Wet (Let's-Read-and-Find-Out Science 2). HarperCollins, 2000.
警告：这些引文格式不一定是100％准确.