Cita APA (7a ed.)

Goddard, H. H. (1920). Human efficiency and levels of human intelligence: Lectures delivered at Princeton University, April 7, 8, 10, 11, 1919. Princeton University Press.

Cita Chicago Style (17a ed.)

Goddard, Henry Herbert. Human Efficiency and Levels of Human Intelligence: Lectures Delivered at Princeton University, April 7, 8, 10, 11, 1919. Princeton : London: Princeton University Press, 1920.

Cita MLA (9a ed.)

Goddard, Henry Herbert. Human Efficiency and Levels of Human Intelligence: Lectures Delivered at Princeton University, April 7, 8, 10, 11, 1919. Princeton University Press, 1920.