Henkel, P. (1813). The Christian catechism: Composed for the instruction of youth in the knowledge of the Christian religion (3d ed.).
Chicago-referens (17:e uppl.)Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth in the Knowledge of the Christian Religion. 3d ed. New Market, Va, 1813.
MLA-referens (8:e uppl.)Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth in the Knowledge of the Christian Religion. 3d ed. 1813.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.