Barker, E. (1974). Academic Freedom. Church, State and Study. Essays., 229-242.
Tohutoru Kātū Chicago (17th ed.)Barker, Ernest. "Academic Freedom." Church, State and Study. Essays. 1974: 229-242.
Tohutoro MLA (9th ed.)Barker, Ernest. "Academic Freedom." Church, State and Study. Essays., 1974, pp. 229-242.
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