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.