APA (7th ed.) Citation

Barrow, J., Ferreira, P., & Silk, J. (1997). Constraints on a Primordial Magnetic Field.

Chicago Style (17th ed.) Citation

Barrow, J., P. Ferreira, and J. Silk. Constraints on a Primordial Magnetic Field. 1997.

MLA (9th ed.) Citation

Barrow, J., et al. Constraints on a Primordial Magnetic Field. 1997.