APA-referens (7:e uppl.)

Harper, F. A. (1949). Liberty, a path to its recovery. Foundation for Economic Education.

Chicago-referens (17:e uppl.)

Harper, F. A. Liberty, a Path to Its Recovery. Irvington-on-Hudson, N.Y: Foundation for Economic Education, 1949.

MLA-referens (8:e uppl.)

Harper, F. A. Liberty, a Path to Its Recovery. Foundation for Economic Education, 1949.