King, Martin Luther. Letter from Birmingham Jail. The Martin Luther King, Jr. Research and Education Institute. 1963-04-16 [2012-08-22]. (原始内容存档于2013-01-09). King began writing the letter on newspaper margins and continued on bits of paper brought by friends.
webcitation.org
King, Martin Luther. Letter from Birmingham Jail. The Martin Luther King, Jr. Research and Education Institute. 1963-04-16 [2012-08-22]. (原始内容存档于2013-01-09). King began writing the letter on newspaper margins and continued on bits of paper brought by friends.