Cita APA (7a ed.)

Hazlitt, W., & Nabholtz, J. R. (1969). An essay on the principles of human action, and some remarks on the systems of Hartley and Helvetius (1805). Scholars' Facsimiles & Reprints.

Cita Chicago Style (17a ed.)

Hazlitt, William, y John R. Nabholtz. An Essay on the Principles of Human Action, and Some Remarks on the Systems of Hartley and Helvetius (1805). Gainesville, Florida: Scholars' Facsimiles & Reprints, 1969.

Cita MLA (9a ed.)

Hazlitt, William, y John R. Nabholtz. An Essay on the Principles of Human Action, and Some Remarks on the Systems of Hartley and Helvetius (1805). Scholars' Facsimiles & Reprints, 1969.