Andrews Colin & Wilson Paul. (1993). Foundation. Headline Feature Books Publishing.
Chicago-čujuhus (17. p.)Andrews Colin juo Wilson Paul. Foundation. London: Headline Feature Books Publishing, 1993.
MLA-čujuhus (9. p.)Andrews Colin juo Wilson Paul. Foundation. Headline Feature Books Publishing, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.