Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Khan, N. A., Singh, S., & Umar, S. (2008). Sulfur Assimilation and Abiotic Stress in Plants. Springer Berlin Heidelberg.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Nafees A. Khan, Sarvajeet Singh, και Shahid Umar. Sulfur Assimilation and Abiotic Stress in Plants. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Sulfur Assimilation and Abiotic Stress in Plants. Springer Berlin Heidelberg, 2008.