Παραπομπή σε μορφή APA (7η εκδ.)

Covich, A. P., & Thorp, J. H. (1991). Ecology and classification of North American freshwater invertebrates. Academic Press, Inc.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Covich, Alan P., και James H. Thorp. Ecology and Classification of North American Freshwater Invertebrates. San Diego: Academic Press, Inc, 1991.

Παραπομπή σε μορφή MLA (8th εκδ.)

Covich, Alan P., και James H. Thorp. Ecology and Classification of North American Freshwater Invertebrates. Academic Press, Inc, 1991.