Rogal, S. J. (1991). A general introduction to hymnody and congregational song. American Theological Library Association ; Scarecrow Press.
Lua i Stíl Chicago (17ú heag.)Rogal, Samuel J. A General Introduction to Hymnody and Congregational Song. [Philadelphia] : Metuchen, N.J.: American Theological Library Association ; Scarecrow Press, 1991.
Lua MLA (8ú heag.)Rogal, Samuel J. A General Introduction to Hymnody and Congregational Song. American Theological Library Association ; Scarecrow Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.