Cita APA (7a ed.)
Knudsen, D. C. (May87). STATA. Professional Geographer, 39(2), 235-237.
Cita Chicago Style (17a ed.)
Knudsen, Daniel C. "STATA." Professional Geographer 39, no. 2 (May87): 235-237.
Cita MLA (9a ed.)
Knudsen, Daniel C. "STATA." Professional Geographer, vol. 39, no. 2, May87, pp. 235-237.
Precaución: Estas citas no son 100% exactas.