Lua APA (7ú heag.)
Posterski, D. C. (1986). Friendship: A window on ministry to youth. Project teen.
Lua i Stíl Chicago (17ú heag.)
Posterski, Donald C. Friendship: A Window on Ministry to Youth. Ontario: Project teen, 1986.
Lua MLA (9ú heag.)
Posterski, Donald C. Friendship: A Window on Ministry to Youth. Project teen, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.