Cita APA (7th ed.)

Pepin, R., & Porcelli, D. (2002). Origin of noble gases in the terrestrial planets.

Cita Chicago (17th ed.)

Pepin, R., i D. Porcelli. Origin of Noble Gases in the Terrestrial Planets. 2002.

Cita MLA (9th ed.)

Pepin, R., i D. Porcelli. Origin of Noble Gases in the Terrestrial Planets. 2002.

Atenció: Aquestes cites poden no estar 100% correctes.