American Sunday-School Union. (1830). A help to the gospels: Containing a harmony, exercises, illustrations and practical lessons (2d ed.). American Sunday-School Union.
Chicagoスタイル(17版)引用形式American Sunday-School Union. A Help to the Gospels: Containing a Harmony, Exercises, Illustrations and Practical Lessons. 2d ed. Philadelphia: American Sunday-School Union, 1830.
MLA(8版)引用形式American Sunday-School Union. A Help to the Gospels: Containing a Harmony, Exercises, Illustrations and Practical Lessons. 2d ed. American Sunday-School Union, 1830.
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