Townsend, H. (1971). Price theory: Selected readings. Penguin.
Lua i Stíl Chicago (17ú heag.)Townsend, Harry. Price Theory: Selected Readings. Harmondsworth: Penguin, 1971.
Lua MLA (8ú heag.)Townsend, Harry. Price Theory: Selected Readings. Penguin, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.