APA (7th ed.) Citation

Sheehy, E. P., & Winchell, C. M. (1970). Guide to reference books: Second supplement, 1967-1968 (8th ed.). American Library Association.

Chicago Style (17th ed.) Citation

Sheehy, Eugene P., and Constance M. Winchell. Guide to Reference Books: Second Supplement, 1967-1968. 8th ed. Chicago: American Library Association, 1970.

MLA (8th ed.) Citation

Sheehy, Eugene P., and Constance M. Winchell. Guide to Reference Books: Second Supplement, 1967-1968. 8th ed. American Library Association, 1970.