Cita APA (7a ed.)

Nelson, L. E. (2015). American presidents: Year by year. Routledge.

Cita Chicago Style (17a ed.)

Nelson, Lyle Emerson. American Presidents: Year by Year. London, England ; New York, New York: Routledge, 2015.

Cita MLA (8a ed.)

Nelson, Lyle Emerson. American Presidents: Year by Year. Routledge, 2015.