Rowland, V., & Birkett, K. (1992). Personal effectiveness for teachers. Simon and Schuster.
Citazione stile Chigago Style (17a edizione)Rowland, Val, e Ken Birkett. Personal Effectiveness for Teachers. Hertfordshire: Simon and Schuster, 1992.
Citatione MLA (9a ed.)Rowland, Val, e Ken Birkett. Personal Effectiveness for Teachers. Simon and Schuster, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.