Cita APA

Coccaro, E. F., & Jacobson, K. C. (2006). PennTwins: A Population-Based Cohort for Twin Studies. Twin Res Hum Genet.

Chicago Style Citation

Coccaro, Emil F., i Kristen C. Jacobson. "PennTwins: A Population-Based Cohort for Twin Studies." Twin Res Hum Genet 2006.

Cita MLA

Coccaro, Emil F., i Kristen C. Jacobson. "PennTwins: A Population-Based Cohort for Twin Studies." Twin Res Hum Genet 2006.