Senn, C. F. (1986). Protestant spiritual traditions. Wipf and Stock Publishers.
Lua i Stíl Chicago (17ú heag.)Senn, C. Frank. Protestant Spiritual Traditions. Eugene: Wipf and Stock Publishers, 1986.
Lua MLA (9ú heag.)Senn, C. Frank. Protestant Spiritual Traditions. Wipf and Stock Publishers, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.