Plueddemann, C. (1990). Pilgrims in progress: Growing through groups. Harold Shaw Publishers.
Lua i Stíl Chicago (17ú heag.)Plueddemann, Carol. Pilgrims in Progress: Growing Through Groups. Wheaton, Illinois: Harold Shaw Publishers, 1990.
Lua MLA (9ú heag.)Plueddemann, Carol. Pilgrims in Progress: Growing Through Groups. Harold Shaw Publishers, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.