Henkel, P. (1811). The Christian catechism: Composed for the instruction of youth in the knowledge of the Christian religion, together with morning and evening hymns, prayers, etc (2nd ed.). Ambrose Henkel.

Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth in the Knowledge of the Christian Religion, Together with Morning and Evening Hymns, Prayers, Etc. 2nd ed. Shenandoah County, Va.: Ambrose Henkel, 1811.

Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth in the Knowledge of the Christian Religion, Together with Morning and Evening Hymns, Prayers, Etc. 2nd ed. Ambrose Henkel, 1811.