APA (7th ed.) Citation

(1986). The Encyclopedia Americana Volume 30 Index. Grolier Incorporated.

Chicago Style (17th ed.) Citation

The Encyclopedia Americana Volume 30 Index. Grolier Incorporated, 1986.

MLA (8th ed.) Citation

The Encyclopedia Americana Volume 30 Index. Grolier Incorporated, 1986.

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