Cita APA (7a ed.)

National Center for Construction Education and Research (U.S). (2000). Maths: Basics version 2.5. National Center for Construction Education and Research.

Cita Chicago Style (17a ed.)

National Center for Construction Education and Research (U.S). Maths: Basics Version 2.5. United States: National Center for Construction Education and Research, 2000.

Cita MLA (8a ed.)

National Center for Construction Education and Research (U.S). Maths: Basics Version 2.5. National Center for Construction Education and Research, 2000.