Walling, D. R. (1997). Hot buttons unraveling 10 controversial issues in education. Phi Delta Kappa Educational Foundation.
Citazione stile Chigago Style (17a edizione)Walling, Donovan R. Hot Buttons Unraveling 10 Controversial Issues in Education. USA: Phi Delta Kappa Educational Foundation, 1997.
Citatione MLA (9a ed.)Walling, Donovan R. Hot Buttons Unraveling 10 Controversial Issues in Education. Phi Delta Kappa Educational Foundation, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.