Barth, H. (1960). The idea of order: Contributions to a philosophy of politics. D. Reidel Pub. Co.
Lua i Stíl Chicago (17ú heag.)Barth, Hans. The Idea of Order: Contributions to a Philosophy of Politics. Holland: D. Reidel Pub. Co, 1960.
Lua MLA (9ú heag.)Barth, Hans. The Idea of Order: Contributions to a Philosophy of Politics. D. Reidel Pub. Co, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.