Cita APA (7a ed.)

Vernon, P. E. (1971). The structure of human abilities ([2nd ed].). Methuen.

Cita Chicago Style (17a ed.)

Vernon, Philip E. The Structure of Human Abilities. [2nd ed]. London: Methuen, 1971.

Cita MLA (9a ed.)

Vernon, Philip E. The Structure of Human Abilities. [2nd ed]. Methuen, 1971.