Tohutoro APA (7th ed.)
Graham, B. (1975). Angels: God's secret agents. Doubleday.
Tohutoru Kātū Chicago (17th ed.)
Graham, Billy. Angels: God's Secret Agents. Garden City, N.Y.: Doubleday, 1975.
Tohutoro MLA (9th ed.)
Graham, Billy. Angels: God's Secret Agents. Doubleday, 1975.
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