Marcuse, H. (1969). A essay on liberation. Beacon.
Chicago-čujuhus (17. p.)Marcuse, Herbert. A Essay on Liberation. Boston: Beacon, 1969.
MLA-čujuhus (9. p.)Marcuse, Herbert. A Essay on Liberation. Beacon, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.