Gaya APA

WILLIAMS, T, H. (1961). A history of the united states / T. Harry Williams, Richard N. Current, Frank Freidel . : Alfred A. Knopf.

Gaya MLA

WILLIAMS, T., Harry. "A history of the united states / T. Harry Williams, Richard N. Current, Frank Freidel". : Alfred A. Knopf, 1961. Referensi.