Cita APA (7a ed.)

Levine, P. B. (2000). The sexual activity and birth control use of American teenagers. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Levine, Phillip B. The Sexual Activity and Birth Control Use of American Teenagers. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Levine, Phillip B. The Sexual Activity and Birth Control Use of American Teenagers. National Bureau of Economic Research, 2000.