Langan, J. (2002). Reading and study skills (7th ed.). Boston: McGraw-Hill.
Chicago Style aipamenaLangan, John. Reading and Study Skills. 7th ed. Boston: McGraw-Hill, 2002.
MLA aipamenaLangan, John. Reading and Study Skills. 7th ed. Boston: McGraw-Hill, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.