Cita APA (7a ed.)

Letwin, S. R. (1998). The Pursuit of Certainty. Liberty Fund.

Cita Chicago Style (17a ed.)

Letwin, Shirley Robin. The Pursuit of Certainty. Indianapolis: Liberty Fund, 1998.

Cita MLA (8a ed.)

Letwin, Shirley Robin. The Pursuit of Certainty. Liberty Fund, 1998.