Richter, L. M., Norris, S. A., & De Wet, T. (2004). Transition from Birth to Ten to Birth to Twenty: The South African cohort reaches 13 years of age.
Παραπομπή Chicago StyleRichter, Linda M., Shane A. Norris, και Thea De Wet. Transition From Birth to Ten to Birth to Twenty: The South African Cohort Reaches 13 Years of Age. 2004.
Παραπομπή MLARichter, Linda M., Shane A. Norris, και Thea De Wet. Transition From Birth to Ten to Birth to Twenty: The South African Cohort Reaches 13 Years of Age. 2004.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.