Gill, K. (1993). Process and portfolios in writing instruction. National Council of Teachers of English.
Citazione stile Chigago Style (17a edizione)Gill, Kent. Process and Portfolios in Writing Instruction. Urbana: National Council of Teachers of English, 1993.
Citatione MLA (9a ed.)Gill, Kent. Process and Portfolios in Writing Instruction. National Council of Teachers of English, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.