APA

Ventura S. J., Curtin S. C. & Mathews T. J. (20000606). Variations in teenage birth rates, 1991-98: national and state trends. : National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System.

Chicago

Ventura S J, Curtin S C and Mathews T J. 20000606. Variations in teenage birth rates, 1991-98: national and state trends. : National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System.

Harvard

Ventura S. J., Curtin S. C. and Mathews T. J. (20000606). Variations in teenage birth rates, 1991-98: national and state trends. : National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System.

MLA

Ventura S J, Curtin S C and Mathews T J. Variations in teenage birth rates, 1991-98: national and state trends. : National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System. 20000606.