Keene, C. (2013). Nancy Drew Diaries: Once Upon a Thriller No. 4. Aladdin Paperbacks.
Lua i Stíl Chicago (17ú heag.)Keene, Carolyn. Nancy Drew Diaries: Once Upon a Thriller No. 4. New York: Aladdin Paperbacks, 2013.
Lua MLA (9ú heag.)Keene, Carolyn. Nancy Drew Diaries: Once Upon a Thriller No. 4. Aladdin Paperbacks, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.