APA

(1999). Blackwell philosophy guides. Malden, Mass. [u.a.]: Blackwell.

Chicago

1999. Blackwell philosophy guides. Malden, Mass. [u.a.]: Blackwell.

Harvard

(1999). Blackwell philosophy guides. Malden, Mass. [u.a.]: Blackwell.

MLA

Blackwell philosophy guides. Malden, Mass. [u.a.]: Blackwell. 1999.