Vernon,Philip E. (1979). Intelligence: Heredity and environment. W H Freeman and Company.
Chicago Edition CitationVernon,Philip E. Intelligence: Heredity and Environment. San Francisco: W H Freeman and Company, 1979.
MLA Edition CitationVernon,Philip E. Intelligence: Heredity and Environment. W H Freeman and Company, 1979.
Warning: These citations may not always be 100% accurate.