Cita APA (7a ed.)

Koopmans, L. H. (1981). An introduction to contemporary statistics. Duxbury.

Cita Chicago Style (17a ed.)

Koopmans, Lambert Herman. An Introduction to Contemporary Statistics. California: Duxbury, 1981.

Cita MLA (9a ed.)

Koopmans, Lambert Herman. An Introduction to Contemporary Statistics. Duxbury, 1981.