APA

Frankfurt H. G., . (1988). The importance of what we care about philosophical essays. Cambridge (Inglaterra): Cambridge University Press.

Chicago

Frankfurt Harry G, . 1988. The importance of what we care about philosophical essays. Cambridge (Inglaterra): Cambridge University Press.

Harvard

Frankfurt H. G., . (1988). The importance of what we care about philosophical essays. Cambridge (Inglaterra): Cambridge University Press.

MLA

Frankfurt Harry G, . The importance of what we care about philosophical essays. Cambridge (Inglaterra): Cambridge University Press. 1988.