APA (7th ed.) Citation

Halsey & Friedman. (1981). Collier's encyclopedia: With bibliography and index. Macmillan Educational.

Chicago Style (17th ed.) Citation

Halsey and Friedman. Collier's Encyclopedia: With Bibliography and Index. New York: Macmillan Educational, 1981.

MLA (8th ed.) Citation

Halsey and Friedman. Collier's Encyclopedia: With Bibliography and Index. Macmillan Educational, 1981.