APA (7th ed.) Citation

Delury. (1983). World encyclopedia of political system. Longman.

Chicago Style (17th ed.) Citation

Delury. World Encyclopedia of Political System. Harlow, Essex: Longman, 1983.

MLA (8th ed.) Citation

Delury. World Encyclopedia of Political System. Longman, 1983.

Warning: These citations may not always be 100% accurate.