APA

Neef D., Siesfeld A. & Cefola J. (2011). The economic impact of knowledge. New York: Taylor & Francis Group.

Chicago

Neef Dale, Siesfeld Anthony and Cefola Jacquelyn. 2011. The economic impact of knowledge. New York: Taylor & Francis Group.

Harvard

Neef D., Siesfeld A. and Cefola J. (2011). The economic impact of knowledge. New York: Taylor & Francis Group.

MLA

Neef Dale, Siesfeld Anthony and Cefola Jacquelyn. The economic impact of knowledge. New York: Taylor & Francis Group. 2011.