APA引文

Graham, W. F. (1975). Angels: God's secret agents. Doubleday.

Chicago Style (17th ed.) Citation

Graham, William Franklin. Angels: God's Secret Agents. Garden City, N.Y: Doubleday, 1975.

MLA引文

Graham, William Franklin. Angels: God's Secret Agents. Doubleday, 1975.

警告：這些引文格式不一定是100％准確.