Gaya APA

PRESTON, R, C., JR, W, L, H. (1974). teaching social Studies in the elementary school (4th ed). United States of Ameria: HOLT,RINEHART AND WINSTON, INC.

Gaya MLA

PRESTON, RALPH, C.., JR, WAYNE, L., HERMAN,. "teaching social Studies in the elementary school". 4th ed United States of Ameria: HOLT,RINEHART AND WINSTON, INC, 1974. Text.