^Roberts، David (2006). British Hit Singles & Albums (ط. 19th). London: Guinness World Records Limited. ص. 289. ISBN:1-904994-10-5.
^Sources vary as to his year of birth. In the liner notes of the two-CD set Good Timin, it is said to be 1942. Other sources, including Joel Whitburn's "Record Research" and writer Christopher G. Feldman, give 1937. The obituary in the Aberdeen Times, quoted in Cashbox, and in The Telegraph (see note at death) gives 1930.