Smith, M. A., & Ylvisaker, M. (1993). Teacher's voice: Portfolios in the classroom. National Writing Project.
Citazione stile Chigago Style (17a edizione)Smith, Mary Ann, e Miriam Ylvisaker. Teacher's Voice: Portfolios in the Classroom. Berkeley: National Writing Project, 1993.
Citatione MLA (9a ed.)Smith, Mary Ann, e Miriam Ylvisaker. Teacher's Voice: Portfolios in the Classroom. National Writing Project, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.