Drucker, P. F. (1969). The age of discontinuity: Guidelines to our changing society (1. Aufl.). Heinemann.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. The Age of Discontinuity: Guidelines to Our Changing Society. 1. Aufl. London: Heinemann, 1969.
Lua MLA (8ú heag.)Drucker, Peter F. The Age of Discontinuity: Guidelines to Our Changing Society. 1. Aufl. Heinemann, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.