^Pat Davis. The Guinness Book of Badminton (Guinness Superlatives Limited, Enfield, Middlesex, England, 1983). 106, 108.
and Herbert Scheele, Ed. The International Badminton Federation Handbook for 1971 (Canterbury, Kent, England, 1971). 164.
^Pat Davis. The Guinness Book of Badminton (Guinness Superlatives Limited, Enfield, Middlesex, England, 1983). 133, 134, 135.
and Herbert Scheele, Ed. The International Badminton Federation Handbook for 1967 (Canterbury, Kent, England, 1967). 105-107.