APA (7th ed.) Zitazioa

Fisher, D. (1963). Graded comprehension for advanced students. Longman.

Chicago Style (17th ed.) Zitazioa

Fisher, David. Graded Comprehension for Advanced Students. London: Longman, 1963.

MLA (9th ed.) Zitazioa

Fisher, David. Graded Comprehension for Advanced Students. Longman, 1963.