Gaya APA

RITCHIE, D, A. (1985). HERITAGE OF FREEDOM : HISTORY OF THE UNITED STATES . NEW YORK: MACMILLAN PUBLISHING COMPANY.

Gaya MLA

RITCHIE, DONALD, A.. "HERITAGE OF FREEDOM : HISTORY OF THE UNITED STATES". NEW YORK: MACMILLAN PUBLISHING COMPANY, 1985. Umum.