APA (7th ed.) Citation

Encyclopædia Britannica. 425 North Michigan Avenue -- Chicago 11, ILL. (1956). Britannica Home Reading Guide: Mathematics. Encyclopædia Britannica, Inc.

Chicago Style (17th ed.) Citation

Encyclopædia Britannica. 425 North Michigan Avenue -- Chicago 11, ILL. Britannica Home Reading Guide: Mathematics. USA: Encyclopædia Britannica, Inc, 1956.

MLA (8th ed.) Citation

Encyclopædia Britannica. 425 North Michigan Avenue -- Chicago 11, ILL. Britannica Home Reading Guide: Mathematics. Encyclopædia Britannica, Inc, 1956.

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