Catherine Hapka. (2013). Pony Scouts: Blue Ribbon Day (I Can Read Level 2) (I Can Read Book 2.). HarperCollins.
芝加哥风格引文Catherine Hapka. Pony Scouts: Blue Ribbon Day (I Can Read Level 2). I Can Read Book 2. HarperCollins, 2013.
MLA引文Catherine Hapka. Pony Scouts: Blue Ribbon Day (I Can Read Level 2). I Can Read Book 2. HarperCollins, 2013.
警告：这些引文格式不一定是100％准确.