Crow, H. L., & Trunbull, W. L. (1972). American history: A problems approach. Holt, Rinehart and Winston.
Chicago-čujuhus (17. p.)Crow, Herman L., juo William L. Trunbull. American History: A Problems Approach. Nueva York: Holt, Rinehart and Winston, 1972.
MLA-čujuhus (9. p.)Crow, Herman L., juo William L. Trunbull. American History: A Problems Approach. Holt, Rinehart and Winston, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.