Citação norma APA

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

Citação norma Chicago

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.

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.