Graham, H. (2010). Ghost walk=bayang-bayang sang sahabat. Violetbooks.
Lua i Stíl Chicago (17ú heag.)Graham, Heather. Ghost Walk=bayang-bayang Sang Sahabat. Violetbooks, 2010.
Lua MLA (8ú heag.)Graham, Heather. Ghost Walk=bayang-bayang Sang Sahabat. Violetbooks, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.