(1982). The art of creative thinking / by Gerard I. Niernberg.
Cita Chicago (17th ed.)The Art of Creative Thinking / by Gerard I. Niernberg. 1982.
Cita MLA (9th ed.)The Art of Creative Thinking / by Gerard I. Niernberg. 1982.
Atenció: Aquestes cites poden no estar 100% correctes.