Crofton, I. (1990). The Guinness encyclopedia. Guiness Publishing.
Chicago-čujuhus (17. p.)Crofton, Ian،. The Guinness Encyclopedia. London: Guiness Publishing, 1990.
MLA-čujuhus (9. p.)Crofton, Ian،. The Guinness Encyclopedia. Guiness Publishing, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.