Cita APA (7a ed.)

Harvard Project Zero, Hetland, L., & Veenema, S. A. (1999). The Project Zero classroom: Views on understanding. Project Zero, Harvard Graduate School of Education.

Cita Chicago Style (17a ed.)

Harvard Project Zero, Lois Hetland, y Shirley A. Veenema. The Project Zero Classroom: Views on Understanding. Cambridge: Project Zero, Harvard Graduate School of Education, 1999.

Cita MLA (9a ed.)

Harvard Project Zero, et al. The Project Zero Classroom: Views on Understanding. Project Zero, Harvard Graduate School of Education, 1999.