Gilbert, I. (2014). Independent thinking. Independent Thinking Press.
Chicago-čujuhus (17. p.)Gilbert, Ian. Independent Thinking. Carmarthen, Wales: Independent Thinking Press, 2014.
MLA-čujuhus (9. p.)Gilbert, Ian. Independent Thinking. Independent Thinking Press, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.