Cita APA (7a ed.)
Cipollina, M., & Salvatici, L. (2012). Hands-on gravity estimation with STATA. International Food Policy Research Institute.
Cita Chicago Style (17a ed.)
Cipollina, Maria, y Luca Salvatici. Hands-on Gravity Estimation with STATA. International Food Policy Research Institute, 2012.
Cita MLA (9a ed.)
Cipollina, Maria, y Luca Salvatici. Hands-on Gravity Estimation with STATA. International Food Policy Research Institute, 2012.
Precaución: Estas citas no son 100% exactas.