Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Plag, H., & Pearlman, M. (2009). Global Geodetic Observing System: Meeting the Requirements of a Global Society on a Changing Planet in 2020. Springer Berlin Heidelberg.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Hans-Peter Plag, και Michael Pearlman. Global Geodetic Observing System: Meeting the Requirements of a Global Society on a Changing Planet in 2020. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Global Geodetic Observing System: Meeting the Requirements of a Global Society on a Changing Planet in 2020. Springer Berlin Heidelberg, 2009.