APA (7th ed.) Citation

(1970). Ayer directory, newspapers, magazines, and trade publications. Ayer Press.

Chicago Style (17th ed.) Citation

Ayer Directory, Newspapers, Magazines, and Trade Publications. Philadelphia: Ayer Press, 1970.

MLA (9th ed.) Citation

Ayer Directory, Newspapers, Magazines, and Trade Publications. Ayer Press, 1970.

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