APA

United nations department for development support and management services, . (1997). Guidelines for improving tax administration in developing countries. New York: United nations.

Chicago

United nations department for development support and management services, . 1997. Guidelines for improving tax administration in developing countries. New York: United nations.

Harvard

United nations department for development support and management services, . (1997). Guidelines for improving tax administration in developing countries. New York: United nations.

MLA

United nations department for development support and management services, . Guidelines for improving tax administration in developing countries. New York: United nations. 1997.