Turner, J. R. (1919). Introduction to economics. Scribner's.
Lua i Stíl Chicago (17ú heag.)Turner, John Roscoe. Introduction to Economics. New York: Scribner's, 1919.
Lua MLA (9ú heag.)Turner, John Roscoe. Introduction to Economics. Scribner's, 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.