APA

(1997). Publishers weekly. New York: R.R. Bowker Company [u.a.].

Chicago

1997. Publishers weekly. New York: R.R. Bowker Company [u.a.].

Harvard

(1997). Publishers weekly. New York: R.R. Bowker Company [u.a.].

MLA

Publishers weekly. New York: R.R. Bowker Company [u.a.]. 1997.