APA citiranje

DRUCKER P. (1989). MANAGEMENT CHALLENGES FOR 21ST CENTURY. BUTTER WORTH.

Chicago Style (17th ed.) Citation

DRUCKER P. MANAGEMENT CHALLENGES FOR 21ST CENTURY. OXFORD: BUTTER WORTH, 1989.

MLA citiranje

DRUCKER P. MANAGEMENT CHALLENGES FOR 21ST CENTURY. BUTTER WORTH, 1989.