APA-viite (7. p.)
ebrary, Inc, & Powers, E. (2011). Freedom of speech: The history of an idea. Bucknell University Press.
Chicago-viite (17. p.)
ebrary, Inc, ja Elizabeth Powers. Freedom of Speech: The History of an Idea. Lewisburg [Pa.]: Bucknell University Press, 2011.
MLA-viite (9. p.)
ebrary, Inc, ja Elizabeth Powers. Freedom of Speech: The History of an Idea. Bucknell University Press, 2011.
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