Struggle for Equality: Quotes From Martin Luther King Jr.- Scholastic Books' Website
An article containing many quotes from Dr. King
http://www.scholastic.com/teachers/article/struggle-equality-quotes-martin-luther-king-jr
Martin Luther King Jr.-Encyclopedia Britannica Online
Free Encyclopedia Article, though not all articles are free on this site.
http://www.britannica.com/EBchecked/topic/318311/Martin-Luther-King-Jr
Martin Luther King Jr. Civil Rights Activist, Minister (1929–1968)
Biography.com
https://www.biography.com/activist/martin-luther-king-jr
Martin Luther King Jr.-Biographical
A short, but well-written biography that also mentions his Nobel Prize from Nobelprize.org
http://www.nobelprize.org/nobel_prizes/peace/laureates/1964/king-bio.html
Martin Luther King Jr.
An informative article with a short accompanying video from History.com
http://www.history.com/topics/black-history/martin-luther-king-jr