Malvern, D., Richards,Brian J, & Chipere,Ngoni. (2004). Lexical diversity and language development: Quantification and assessment. Palgrave Macmillan.
Lua i Stíl Chicago (17ú heag.)Malvern, David, Richards,Brian J, agus Chipere,Ngoni. Lexical Diversity and Language Development: Quantification and Assessment. Houndmills, Basingstoke, Hampshire ; New York: Palgrave Macmillan, 2004.
Lua MLA (8ú heag.)Malvern, David, et al. Lexical Diversity and Language Development: Quantification and Assessment. Palgrave Macmillan, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.