Cita APA (7a ed.)

Howard, R. A. (1991). Pedro Duque Cornejo: 1678-1757. University Microfilms International.

Cita Chicago Style (17a ed.)

Howard, Ryan Abney. Pedro Duque Cornejo: 1678-1757. Ann Arbor: University Microfilms International, 1991.

Cita MLA (9a ed.)

Howard, Ryan Abney. Pedro Duque Cornejo: 1678-1757. University Microfilms International, 1991.