Davidson, B. R., & Billy Ray Davidson. (2007). Children of liberty. Columbus, Ohio: SRA/McGraw-Hill.
Chicago Style aipamenaDavidson, Billy Ray, và Billy Ray Davidson. Children of Liberty. Columbus, Ohio: SRA/McGraw-Hill, 2007.
MLA aipamenaDavidson, Billy Ray, và Billy Ray Davidson. Children of Liberty. Columbus, Ohio: SRA/McGraw-Hill, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.