Drucker, P. F. (1971). The Age Of Discountinuty Guidlines To Our Changing Society Peter F. Drucker. Pan Books.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. The Age Of Discountinuty Guidlines To Our Changing Society Peter F. Drucker. Pan Books, 1971.
Lua MLA (8ú heag.)Drucker, Peter F. The Age Of Discountinuty Guidlines To Our Changing Society Peter F. Drucker. Pan Books, 1971.
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