APA (7th ed.) Zitazioa
Graham, B. (1983). Approaching hoofbeats: The four horsemen of the apocalypse. Word.
Chicago Style (17th ed.) Zitazioa
Graham, Billy. Approaching Hoofbeats: The Four Horsemen of the Apocalypse. Waco: Word, 1983.
MLA (9th ed.) Zitazioa
Graham, Billy. Approaching Hoofbeats: The Four Horsemen of the Apocalypse. Word, 1983.
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