Παραπομπή σε μορφή APA (7η εκδ.)

Krutch, J. W., & Landacre, P. (2009). The great chain of life (1st University of Iowa Press ed.). University of Iowa Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Krutch, Joseph Wood, και Paul Landacre. The Great Chain of Life. 1st University of Iowa Press ed. Iowa City: University of Iowa Press, 2009.

Παραπομπή σε μορφή MLA (9th εκδ.)

Krutch, Joseph Wood, και Paul Landacre. The Great Chain of Life. 1st University of Iowa Press ed. University of Iowa Press, 2009.