APA (7th ed.) Citation

The new encyclopaedia Britannica (15. ed., [26. print.].). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britannica. 15. ed., [26. print.]. Chicago [u.a.]: Encyclopaedia Britannica.

MLA (9th ed.) Citation

The New Encyclopaedia Britannica. 15. ed., [26. print.]. Encyclopaedia Britannica.

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