APA

Hartnack J., Hartshorne J., .Kant's theory of knowledge. New York: .

Chicago

Hartnack Justus, Hartshorne Justus, .Kant's theory of knowledge. New York: .

Harvard

Hartnack J., Hartshorne J., .Kant's theory of knowledge. New York: .

MLA

Hartnack Justus, Hartshorne Justus, .New York: . .