APA

Myer W., . (1952). America's greatest challenge. Washington: Civic education service.

Chicago

Myer W.E, . 1952. America's greatest challenge. Washington: Civic education service.

Harvard

Myer W., . (1952). America's greatest challenge. Washington: Civic education service.

MLA

Myer W.E, . America's greatest challenge. Washington: Civic education service. 1952.