APA

Hallowell J. H., . (1950). Main currents in modern political thought. New York: Henry Holt and Company.

Chicago

Hallowell John H, . 1950. Main currents in modern political thought. New York: Henry Holt and Company.

Harvard

Hallowell J. H., . (1950). Main currents in modern political thought. New York: Henry Holt and Company.

MLA

Hallowell John H, . Main currents in modern political thought. New York: Henry Holt and Company. 1950.