O'Connor, J. (1944). Aptitudes and the languages. Human Engineering Laboratory.
Citazione stile Chigago Style (17a edizione)O'Connor, Johnson. Aptitudes and the Languages. [Boston]: Human Engineering Laboratory, 1944.
Citatione MLA (9a ed.)O'Connor, Johnson. Aptitudes and the Languages. Human Engineering Laboratory, 1944.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.