APA (7th ed.) Citation

Held, E. V., & Wagner, S. (1995). The globular cluster systems of two elliptical galaxies. Fresh views of elliptical galaxies.

Chicago Style (17th ed.) Citation

Held, Enrico V., and Stefan Wagner. "The Globular Cluster Systems of Two Elliptical Galaxies." Fresh Views of Elliptical Galaxies 1995.

MLA (9th ed.) Citation

Held, Enrico V., and Stefan Wagner. "The Globular Cluster Systems of Two Elliptical Galaxies." Fresh Views of Elliptical Galaxies, 1995.

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