APA-čujuhus (7. p.)
Boff, L. (2008). Essential care: An ethics of human nature. Baylor University Press.
Chicago-čujuhus (17. p.)
Boff, Leonardo. Essential Care: An Ethics of Human Nature. Waco, TX: Baylor University Press, 2008.
MLA-čujuhus (9. p.)
Boff, Leonardo. Essential Care: An Ethics of Human Nature. Baylor University Press, 2008.
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