Cita APA

Kohler, U., & Kreuter, F. (2012). Data analysis using stata (3rd.). Stata.

Chicago Edition Citation

Kohler, Ulrich, i Frauke Kreuter. Data Analysis Using Stata. 3rd. Texas: Stata, 2012.

Cita MLA

Kohler, Ulrich, i Frauke Kreuter. Data Analysis Using Stata. 3rd. Stata, 2012.