Neill, H. B. (1963). The art of contrary thinking: It pays to be contrary (6th and enl. ed.). Caxton Printers.
Chicago-referens (17:e uppl.)Neill, Humphrey B. The Art of Contrary Thinking: It Pays to Be Contrary. 6th and enl. ed. Caldwell, Idaho: Caxton Printers, 1963.
MLA-referens (9:e uppl.)Neill, Humphrey B. The Art of Contrary Thinking: It Pays to Be Contrary. 6th and enl. ed. Caxton Printers, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.