APA (7th ed.) Zitazioa
Parsons, C. (2007). John B. Armstrong: Texas Ranger and pioneer ranchman. Texas A&M University Press.
Chicago Style (17th ed.) Zitazioa
Parsons, Chuck. John B. Armstrong: Texas Ranger and Pioneer Ranchman. College Station: Texas A&M University Press, 2007.
MLA (9th ed.) Zitazioa
Parsons, Chuck. John B. Armstrong: Texas Ranger and Pioneer Ranchman. Texas A&M University Press, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.