APA (7th ed.) Citation

(1981). Worldmark encyclopedia of the States. Worldmark Press Harper & Row.

Chicago Style (17th ed.) Citation

Worldmark Encyclopedia of the States. [New York]: Worldmark Press Harper & Row, 1981.

MLA (9th ed.) Citation

Worldmark Encyclopedia of the States. Worldmark Press Harper & Row, 1981.

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