Nicholas Sparks. (2016). Two by two. Grand Central Publishing.
Lua i Stíl Chicago (17ú heag.)Nicholas Sparks. Two by Two. United State of America: Grand Central Publishing, 2016.
Lua MLA (8ú heag.)Nicholas Sparks. Two by Two. Grand Central Publishing, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.