APA-čujuhus (7. p.)
Echard, S. (2008). Printing the Middle Ages. PENN/University of Pennsylvania Press.
Chicago-čujuhus (17. p.)
Echard, Siân. Printing the Middle Ages. Philadelphia: PENN/University of Pennsylvania Press, 2008.
MLA-čujuhus (9. p.)
Echard, Siân. Printing the Middle Ages. PENN/University of Pennsylvania Press, 2008.
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