Cathcart, J. (2009). The Acorn Principle. Embassy Book.
Chicago-čujuhus (17. p.)Cathcart, Jim. The Acorn Principle. Mumbai: Embassy Book, 2009.
MLA-čujuhus (9. p.)Cathcart, Jim. The Acorn Principle. Embassy Book, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.