Παραπομπή σε μορφή APA (7η εκδ.)

Bull-Berg, H. J. (1984). Restoring the oil-smeared eagle: The U.S. oil regime strategy, 1973-1983. Fridtjof Nansen Institute at Polhøgda.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bull-Berg, Hans Jacob. Restoring the Oil-smeared Eagle: The U.S. Oil Regime Strategy, 1973-1983. Lysaker, Norway: Fridtjof Nansen Institute at Polhøgda, 1984.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bull-Berg, Hans Jacob. Restoring the Oil-smeared Eagle: The U.S. Oil Regime Strategy, 1973-1983. Fridtjof Nansen Institute at Polhøgda, 1984.