Παραπομπή σε μορφή APA (7η εκδ.)

Discovery Channel School. (2005). Conservation of natural resources (version 2.0.). Discovery Channel School.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Discovery Channel School. Conservation of Natural Resources. version 2.0. s.l: Discovery Channel School, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

Discovery Channel School. Conservation of Natural Resources. version 2.0. Discovery Channel School, 2005.