Chemistry, c2008: t.p. (Thandi Buthelezi) p. iv (Thandi Buthelezi; Associate Prof. of Chemistry at Western Kentucky University, Bowling Green, KY)

Glencoe chemistry : matter and change, c2017: t.p. (Thandi Buthelezi)

Biblioteca del congreso (Estados Unidos), 28 enero 2020: Catálogo electrónico http://bit.ly/2OmFbPx