Hasenkamp, G. (1976). Specification and estimation of multiple-output production functions. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Hasenkamp, Georg. Specification and Estimation of Multiple-output Production Functions. Berlin ; New York: Springer-Verlag, 1976.
Lua MLA (8ú heag.)Hasenkamp, Georg. Specification and Estimation of Multiple-output Production Functions. Springer-Verlag, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.