Traina, R. A. (1952). Methodical Bible Study. Zondervan.
Lua i Stíl Chicago (17ú heag.)Traina, Robert A. Methodical Bible Study. Grand Rapids: Zondervan, 1952.
Lua MLA (9ú heag.)Traina, Robert A. Methodical Bible Study. Zondervan, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.