Gaya APA
SAVAGE, T, V., ARMSTRONG, D, G. (2000).
Effective teaching in elementary social studies (4th ed.).
Upper Saddle River:
Merrill.
Gaya MLA
SAVAGE, Tom, V.., ARMSTRONG, David, G..
"Effective teaching in elementary social studies".
4th ed.
Upper Saddle River:
Merrill,
2000.
Text.