Valavanis, S., & Conrad, A. h. (1959). Econometrics: An introduction to maximum likelihood methods. toronto.
Παραπομπή σε μορφή Chicago (17η εκδ.)Valavanis, Stefan, και Alfred h. Conrad. Econometrics: An Introduction to Maximum Likelihood Methods. london: toronto, 1959.
Παραπομπή σε μορφή MLA (9th εκδ.)Valavanis, Stefan, και Alfred h. Conrad. Econometrics: An Introduction to Maximum Likelihood Methods. toronto, 1959.