APA-čujuhus (7. p.)
Engstrom, S. P. (2009). The form of practical knowledge: A study of the categorical imperative. Harvard University Press.
Chicago-čujuhus (17. p.)
Engstrom, Stephen P. The Form of Practical Knowledge: A Study of the Categorical Imperative. Cambridge, Mass.: Harvard University Press, 2009.
MLA-čujuhus (9. p.)
Engstrom, Stephen P. The Form of Practical Knowledge: A Study of the Categorical Imperative. Harvard University Press, 2009.
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