APA

(1999). The Economic Journal - Vol.109 No.456. Inglaterra: Royal Economic Society.

Chicago

1999. The Economic Journal - Vol.109 No.456. Inglaterra: Royal Economic Society.

Harvard

(1999). The Economic Journal - Vol.109 No.456. Inglaterra: Royal Economic Society.

MLA

The Economic Journal - Vol.109 No.456. Inglaterra: Royal Economic Society. 1999.