Cita APA

Lynch, J., Walk, N., & Dayas, M. (2010). How the earth changed history. [S.l.]: BBC Productions.

Citación estilo Chicago

Lynch, John, Nigel Walk, y Mattew Dayas. How the Earth Changed History. [S.l.]: BBC Productions, 2010.

Cita MLA

Lynch, John, Nigel Walk, y Mattew Dayas. How the Earth Changed History. [S.l.]: BBC Productions, 2010.