Barrow, J., Ferreira, P., & Silk, J. (1997). Constraints on a Primordial Magnetic Field.
芝加哥风格引文Barrow, J., P. Ferreira, 与 J. Silk. Constraints on a Primordial Magnetic Field. 1997.
MLA引文Barrow, J., et al. Constraints on a Primordial Magnetic Field. 1997.
警告：这些引文格式不一定是100％准确.