APA (7th ed.) Citation

Norris, J. E., & Christlieb, N. (2012). The most metal-poor stars: IV. the two populations with [Fe/H] <~ -3.0. Arxiv.

Chicago Style (17th ed.) Citation

Norris, John E., and Norbert Christlieb. "The Most Metal-poor Stars: IV. the Two Populations with [Fe/H] <~ -3.0." Arxiv 2012.

MLA (9th ed.) Citation

Norris, John E., and Norbert Christlieb. "The Most Metal-poor Stars: IV. the Two Populations with [Fe/H] <~ -3.0." Arxiv, 2012.

Warning: These citations may not always be 100% accurate.