Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Callaway, T. R., & Ricke, S. C. (2012). Direct-Fed Microbials and Prebiotics for Animals: Science and Mechanisms of Action. Springer New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Todd R. Callaway, και Steven C. Ricke. Direct-Fed Microbials and Prebiotics for Animals: Science and Mechanisms of Action. New York, NY: Springer New York, 2012.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Direct-Fed Microbials and Prebiotics for Animals: Science and Mechanisms of Action. Springer New York, 2012.