Henkel, P. (1816). The Christian catechism: Composed for the instruction of youth, in the knowledge of the Christian religion (5th ed., from enl. 4th ed.). S. Henkel.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth, in the Knowledge of the Christian Religion. 5th ed., from enl. 4th ed. New Market, Va.: S. Henkel, 1816.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Henkel, Paul. The Christian Catechism: Composed for the Instruction of Youth, in the Knowledge of the Christian Religion. 5th ed., from enl. 4th ed. S. Henkel, 1816.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.