APA (7th ed.) Citation

Delury, G. E. (1983). World encyclopedia of political systems. Longman.

Chicago Style (17th ed.) Citation

Delury, George E. World Encyclopedia of Political Systems. Harlow: Longman, 1983.

MLA (9th ed.) Citation

Delury, George E. World Encyclopedia of Political Systems. Longman, 1983.

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