APA (7th ed.) Citation

Janssen, S. (2020). The World Almanac and Book of Facts 2021.

Chicago Style (17th ed.) Citation

Janssen, Sarah. The World Almanac and Book of Facts 2021. 2020.

MLA (9th ed.) Citation

Janssen, Sarah. The World Almanac and Book of Facts 2021. 2020.

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