Cita APA (7a ed.)

Wallis, K. F. (1972). Introductory econometrics. Gray-Mills Publishing.

Cita Chicago Style (17a ed.)

Wallis, Kenneth F. Introductory Econometrics. London: Gray-Mills Publishing, 1972.

Cita MLA (9a ed.)

Wallis, Kenneth F. Introductory Econometrics. Gray-Mills Publishing, 1972.