APA-čujuhus (7. p.)
Otterspeer, W. (2008). The bastion of liberty: Leiden University today and yesterday. Leiden University Press.
Chicago-čujuhus (17. p.)
Otterspeer, W. The Bastion of Liberty: Leiden University Today and Yesterday. Leiden: Leiden University Press, 2008.
MLA-čujuhus (9. p.)
Otterspeer, W. The Bastion of Liberty: Leiden University Today and Yesterday. Leiden University Press, 2008.
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