Graham, B. (1983). Approaching hoofbeats: The four horsemen of the apocalypse. Word.
芝加哥风格引文Graham, Billy. Approaching Hoofbeats: The Four Horsemen of the Apocalypse. Waco: Word, 1983.
MLA引文Graham, Billy. Approaching Hoofbeats: The Four Horsemen of the Apocalypse. Word, 1983.
警告：这些引文格式不一定是100％准确.