APA-viite (7. p.)
Porter, F., Leigh, T., & Spring, J. (2005). Material witness: The selected letters of Fairfield Porter. University of Michigan Press.
Chicago-viite (17. p.)
Porter, Fairfield, Ted Leigh, ja Justin Spring. Material Witness: The Selected Letters of Fairfield Porter. Ann Arbor: University of Michigan Press, 2005.
MLA-viite (9. p.)
Porter, Fairfield, et al. Material Witness: The Selected Letters of Fairfield Porter. University of Michigan Press, 2005.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.