Readings in Extraversion/Introversion (1971) three volumes Race, Intelligence and Education (1971) in US as The IQ Argument Psychology is about People (1972) Lexicon de Psychologie (1972) three volumes, with W. Arnold and R. Meili The Inequality of Man (1973).
Readings in Extraversion/Introversion (1971) üç cilt halinde Race, Intelligence and Education (1971) ABD'de The IQ Argument adıyla yayımlandı Psychology is about People (1972) Lexicon de Psychologie (1972) üç cilt halinde, W. Arnold ve R. Meili ile birliktw The Inequality of Man (1973).