Cita APA (7a ed.)

Trigo, P., & Barr, R. R. (1992). Creation and history. Burns & Oates.

Cita Chicago Style (17a ed.)

Trigo, Pedro, y Robert R. Barr. Creation and History. Kent [England]: Burns & Oates, 1992.

Cita MLA (9a ed.)

Trigo, Pedro, y Robert R. Barr. Creation and History. Burns & Oates, 1992.