Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Martinelli, L. A., & Howarth, R. W. (2006). Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls. Springer Netherlands.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Luiz A. Martinelli, και Robert W. Howarth. Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls. Dordrecht: Springer Netherlands, 2006.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls. Springer Netherlands, 2006.