Cita APA (7a ed.)

Porter, F., Spring, J., & Leigh, T. (2005). Material Witness: The Selected Letters of Fairfield Porter. University of Michigan Press.

Cita Chicago Style (17a ed.)

Porter, Fairfield, Justin Spring, y Ted Leigh. Material Witness: The Selected Letters of Fairfield Porter. Ann Arbor: University of Michigan Press, 2005.

Cita MLA (8a ed.)

Porter, Fairfield, et al. Material Witness: The Selected Letters of Fairfield Porter. University of Michigan Press, 2005.