Fraenkel, J. R. (1973). Helping students think and value: Strategies for teaching the social studies. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Fraenkel, Jack R. Helping Students Think and Value: Strategies for Teaching the Social Studies. Englewood Cliffs, N.J., Manila: Prentice-Hall, 1973.
Lua MLA (9ú heag.)Fraenkel, Jack R. Helping Students Think and Value: Strategies for Teaching the Social Studies. Prentice-Hall, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.