Παραπομπή σε μορφή APA (7η εκδ.)

Harkin, M. E., & Lewis, D. R. (2007). Native Americans and the environment: Perspectives on the ecological Indian. University of Nebraska Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Harkin, Michael Eugene, και David Rich Lewis. Native Americans and the Environment: Perspectives on the Ecological Indian. Lincoln: University of Nebraska Press, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Harkin, Michael Eugene, και David Rich Lewis. Native Americans and the Environment: Perspectives on the Ecological Indian. University of Nebraska Press, 2007.