Cita APA (7a ed.)

O'Connor, J. (1944). Aptitudes and the languages. Human Engineering Laboratory.

Cita Chicago Style (17a ed.)

O'Connor, Johnson. Aptitudes and the Languages. [Boston]: Human Engineering Laboratory, 1944.

Cita MLA (9a ed.)

O'Connor, Johnson. Aptitudes and the Languages. Human Engineering Laboratory, 1944.