APA (7 ম সংস্করণ) উদ্ধৃতি

Heckman, J., Tobias, J. L., & Vytlacil, E. (2000). Simple estimators for treatment parameters in a latent variable framework with an application to estiamting the returns to schooling. National Bureau of Economic Research.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Heckman, James, Justin L. Tobias, এবং Edward Vytlacil. Simple Estimators for Treatment Parameters in a Latent Variable Framework with an Application to Estiamting the Returns to Schooling. Cambridge: National Bureau of Economic Research, 2000.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Heckman, James, et al. Simple Estimators for Treatment Parameters in a Latent Variable Framework with an Application to Estiamting the Returns to Schooling. National Bureau of Economic Research, 2000.