APA

Kiekhofer W. H., . (1946). Economic principles, problems and policies. New York ; Londres: D. Appleton-Century Company.

Chicago

Kiekhofer William H, . 1946. Economic principles, problems and policies. New York ; Londres: D. Appleton-Century Company.

Harvard

Kiekhofer W. H., . (1946). Economic principles, problems and policies. New York ; Londres: D. Appleton-Century Company.

MLA

Kiekhofer William H, . Economic principles, problems and policies. New York ; Londres: D. Appleton-Century Company. 1946.