APA

(1978). Rich and poor nations in the world economy. México, D.F: McGraw-Hill.

Chicago

1978. Rich and poor nations in the world economy. México, D.F: McGraw-Hill.

Harvard

(1978). Rich and poor nations in the world economy. México, D.F: McGraw-Hill.

MLA

Rich and poor nations in the world economy. México, D.F: McGraw-Hill. 1978.