Gaya APA
Billy, G. (2001).
Approaching Hoofbeats : The Four Horsemen Of The Apocalypse (Trawas) .
Minneapolis:
Grason Publishers.
Gaya MLA
Billy, Graham.
"Approaching Hoofbeats : The Four Horsemen Of The Apocalypse (Trawas)".
Minneapolis:
Grason Publishers,
2001.
Text.