Παραπομπή σε μορφή APA (7η εκδ.)

U.S. Energy Information Administration. Review of emerging resources , U.S. shale gas and shale oil plays.

Παραπομπή σε μορφή Chicago (17η εκδ.)

U.S. Energy Information Administration. Review of Emerging Resources , U.S. Shale Gas and Shale Oil Plays.

Παραπομπή σε μορφή MLA (9th εκδ.)

U.S. Energy Information Administration. Review of Emerging Resources , U.S. Shale Gas and Shale Oil Plays.