APA (7th ed.) Citation

Lehmann, A., Tryggvadottir, L., Scheffler, C., & Hermanussen, M. (2011). Menarcheal age and body height in Iceland in the last century.

Chicago Style (17th ed.) Citation

Lehmann, Andreas, Laufey Tryggvadottir, Christiane Scheffler, and Michael Hermanussen. Menarcheal Age and Body Height in Iceland in the Last Century. 2011.

MLA (9th ed.) Citation

Lehmann, Andreas, et al. Menarcheal Age and Body Height in Iceland in the Last Century. 2011.