APA (7th ed.) Citation

Karachentsev, I. D., & Grebel, E. K. (2001). WFPC2 observations of two dwarf spheroidal galaxies in the M 81 group. Arxiv.

Chicago Style (17th ed.) Citation

Karachentsev, Igor D., and Eva K. Grebel. "WFPC2 Observations of Two Dwarf Spheroidal Galaxies in the M 81 Group." Arxiv 2001.

MLA (9th ed.) Citation

Karachentsev, Igor D., and Eva K. Grebel. "WFPC2 Observations of Two Dwarf Spheroidal Galaxies in the M 81 Group." Arxiv, 2001.

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