Cita APA

Discovery Channel School. (2005). Universe (version 2.0.). Discovery Channel School.

Citación estilo Chicago

Discovery Channel School. Universe. version 2.0. s.l: Discovery Channel School, 2005.

Cita MLA

Discovery Channel School. Universe. version 2.0. Discovery Channel School, 2005.

Warning: These citations may not always be 100% accurate.