Παραπομπή σε μορφή APA (7η εκδ.)

Mullens, T. E. (1979). Stratigraphy, petrology, and some fossil data of the Roberts Mountains formation, north-central Nevada. Dept. of the Interior, Geological Survey.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Mullens, Thomas E. Stratigraphy, Petrology, and Some Fossil Data of the Roberts Mountains Formation, North-central Nevada. [Reston, Va.]: Dept. of the Interior, Geological Survey, 1979.

Παραπομπή σε μορφή MLA (9th εκδ.)

Mullens, Thomas E. Stratigraphy, Petrology, and Some Fossil Data of the Roberts Mountains Formation, North-central Nevada. Dept. of the Interior, Geological Survey, 1979.