Παραπομπή σε μορφή APA (7η εκδ.)

Wold, M. (2001). The environment of active galactic nuclei: Excess counts and the nature of their host clusters.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wold, Margrethe. The Environment of Active Galactic Nuclei: Excess Counts and the Nature of Their Host Clusters. 2001.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wold, Margrethe. The Environment of Active Galactic Nuclei: Excess Counts and the Nature of Their Host Clusters. 2001.