Cita APA (7th ed.)

Mathematica, inc., Princeton, N.J, & United States. National Advisory Commission on Libraries. (1967). On library statistics: Submitted to the National Advisory Commission on Libraries. National Advisory Commission on Libraries.

Cita Chicago (17th ed.)

Mathematica, inc., Princeton, N.J, i United States. National Advisory Commission on Libraries. On Library Statistics: Submitted to the National Advisory Commission on Libraries. Washington, D.C.: National Advisory Commission on Libraries, 1967.

Cita MLA (8th ed.)

Mathematica, inc., Princeton, N.J, i United States. National Advisory Commission on Libraries. On Library Statistics: Submitted to the National Advisory Commission on Libraries. National Advisory Commission on Libraries, 1967.