APA

Heyne P. T., . (19671968). Private keepers of the public interest. New York: McGraw-Hill.

Chicago

Heyne Paul T, . 19671968. Private keepers of the public interest. New York: McGraw-Hill.

Harvard

Heyne P. T., . (19671968). Private keepers of the public interest. New York: McGraw-Hill.

MLA

Heyne Paul T, . Private keepers of the public interest. New York: McGraw-Hill. 19671968.