John Grogan. (2012). Marley: Firehouse Dog (I Can Read Level 2). HarperCollins.
Lua i Stíl Chicago (17ú heag.)John Grogan. Marley: Firehouse Dog (I Can Read Level 2). HarperCollins, 2012.
Lua MLA (9ú heag.)John Grogan. Marley: Firehouse Dog (I Can Read Level 2). HarperCollins, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.