APA (7th ed.) Citation

(1966). The New Book of Knowledge, Volume 20 W-X-Y-Z. Grolier.

Chicago Style (17th ed.) Citation

The New Book of Knowledge, Volume 20 W-X-Y-Z. Grolier, 1966.

MLA (8th ed.) Citation

The New Book of Knowledge, Volume 20 W-X-Y-Z. Grolier, 1966.

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