John Grogan. (2012). Marley: Firehouse Dog (I Can Read Level 2). HarperCollins.
芝加哥风格引文John Grogan. Marley: Firehouse Dog (I Can Read Level 2). HarperCollins, 2012.
MLA引文John Grogan. Marley: Firehouse Dog (I Can Read Level 2). HarperCollins, 2012.
警告：这些引文格式不一定是100％准确.