APA
Keen P. G., . (1991). Every manager's guide to information technology : a glossary of key terms and concepts for today's business leader. Boston, Mass: Harvard Business School Press.
Chicago
Keen Peter G.W, . 1991. Every manager's guide to information technology : a glossary of key terms and concepts for today's business leader. Boston, Mass: Harvard Business School Press.
Harvard
Keen P. G., . (1991). Every manager's guide to information technology : a glossary of key terms and concepts for today's business leader. Boston, Mass: Harvard Business School Press.
MLA
Keen Peter G.W, . Every manager's guide to information technology : a glossary of key terms and concepts for today's business leader. Boston, Mass: Harvard Business School Press. 1991.