Cita APA (7th ed.)

Smith, M. A., & Ylvisaker, M. (1993). Teacher's voice: Portfolios in the classroom. National Writing Project.

Cita Chicago (17th ed.)

Smith, Mary Ann, i Miriam Ylvisaker. Teacher's Voice: Portfolios in the Classroom. Berkeley: National Writing Project, 1993.

Cita MLA (9th ed.)

Smith, Mary Ann, i Miriam Ylvisaker. Teacher's Voice: Portfolios in the Classroom. National Writing Project, 1993.