SpringerLink (Online service), Flechtner, F., Sneeuw, N., & Schuh, W. (2014). Observation of the System Earth from Space - CHAMP, GRACE, GOCE and future missions: GEOTECHNOLOGIEN Science Report No. 20. Springer Berlin Heidelberg : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Frank Flechtner, Nico Sneeuw, και Wolf-Dieter Schuh. Observation of the System Earth from Space - CHAMP, GRACE, GOCE and Future Missions: GEOTECHNOLOGIEN Science Report No. 20. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2014.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Observation of the System Earth from Space - CHAMP, GRACE, GOCE and Future Missions: GEOTECHNOLOGIEN Science Report No. 20. Springer Berlin Heidelberg : Imprint: Springer, 2014.
