APA (7th ed.) Citation

Paul, S. N., Kato, B. S., Cherkas, L. F., Andrew, T., & Spector, T. D. (2006). Heritability of the Second to Fourth Digit Ratio (2d: 4d): A Twin Study. Twin research and human genetics, 9(2), 215-219. https://doi.org/10.1375/twin.9.2.215

Chicago Style (17th ed.) Citation

Paul, Simon N., Bernet S. Kato, Lynn F. Cherkas, Toby Andrew, and Tim D. Spector. "Heritability of the Second to Fourth Digit Ratio (2d: 4d): A Twin Study." Twin Research and Human Genetics 9, no. 2 (2006): 215-219. https://doi.org/10.1375/twin.9.2.215.

MLA (9th ed.) Citation

Paul, Simon N., et al. "Heritability of the Second to Fourth Digit Ratio (2d: 4d): A Twin Study." Twin Research and Human Genetics, vol. 9, no. 2, 2006, pp. 215-219, https://doi.org/10.1375/twin.9.2.215.