APA (7th ed.) Citation

Special Libraries Association. Philadelphia Chapter & Cross, B. (1987). Guide to constitutional information resources in the Delaware Valley. Special Libraries Association.

Chicago Style (17th ed.) Citation

Special Libraries Association. Philadelphia Chapter and Bobbi Cross. Guide to Constitutional Information Resources in the Delaware Valley. [Philadelphia?]: Special Libraries Association, 1987.

MLA (8th ed.) Citation

Special Libraries Association. Philadelphia Chapter and Bobbi Cross. Guide to Constitutional Information Resources in the Delaware Valley. Special Libraries Association, 1987.

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