Langan, J. (1998). Reading and study skills (6th ed.). McGraw-Hill Higher Education.
Citazione stile Chigago Style (17a edizione)Langan, John. Reading and Study Skills. 6th ed. New York, NY : Bostom: McGraw-Hill Higher Education, 1998.
Citatione MLA (8a ed.)Langan, John. Reading and Study Skills. 6th ed. McGraw-Hill Higher Education, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.