Gilhooly, K. J. (1982). Thinking: Directed, undirected and creative. Academic Press.
Citazione stile Chigago Style (17a edizione)Gilhooly, Kenneth J. Thinking: Directed, Undirected and Creative. London [i pozostałe]: Academic Press, 1982.
Citatione MLA (9a ed.)Gilhooly, Kenneth J. Thinking: Directed, Undirected and Creative. Academic Press, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.