APA (7th ed.) Citation

National Science Teachers Association & Pearsall, M. K. (1993). The Content core: A guide for curriculum designers. National Science Teachers Association.

Chicago Style (17th ed.) Citation

National Science Teachers Association and Marcia K. Pearsall. The Content Core: A Guide for Curriculum Designers. Washington, D.C: National Science Teachers Association, 1993.

MLA (8th ed.) Citation

National Science Teachers Association and Marcia K. Pearsall. The Content Core: A Guide for Curriculum Designers. National Science Teachers Association, 1993.