"Dave Blackman, M. B. S. B. (2019). Formula One Maths Gold.
Chicago-čujuhus (17. p.)"Dave Blackman, Margaret Bland Susan Ball". Formula One Maths Gold. 2019.
MLA-čujuhus (9. p.)"Dave Blackman, Margaret Bland Susan Ball". Formula One Maths Gold. 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.