Valavanis, S., & Conrad, A. h. (1959). Econometrics: An introduction to maximum likelihood methods. toronto.
Citazione stile Chigago Style (17a edizione)Valavanis, Stefan, e Alfred h. Conrad. Econometrics: An Introduction to Maximum Likelihood Methods. london: toronto, 1959.
Citatione MLA (9a ed.)Valavanis, Stefan, e Alfred h. Conrad. Econometrics: An Introduction to Maximum Likelihood Methods. toronto, 1959.