APA (7th ed.) Zitazioa
Bellanca, J. (1990). Keep Them Thinking: A Handbook of Model Lessons: Level III, High School 7-12.
Chicago Style (17th ed.) Zitazioa
Bellanca, James. Keep Them Thinking: A Handbook of Model Lessons: Level III, High School 7-12. 1990.
MLA (9th ed.) Zitazioa
Bellanca, James. Keep Them Thinking: A Handbook of Model Lessons: Level III, High School 7-12. 1990.
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