Cita APA

Nelson, L. E. (2015). American presidents: Year by year. London, England ; New York, New York: Routledge.

Citación estilo Chicago

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

Cita MLA

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