Cunliffe, M. (1968). American Presidents and the Presidency. Eyre and Spootiswood.
Chicago-viite (17. p.)Cunliffe, Marcus. American Presidents and the Presidency. London: Eyre and Spootiswood, 1968.
MLA-viite (9. p.)Cunliffe, Marcus. American Presidents and the Presidency. Eyre and Spootiswood, 1968.
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