APA (7th ed.) Citation

National Society of Professional Engineers. (1985). Professional engineering directory (National ed.). BellSouth National Pub..

Chicago Style (17th ed.) Citation

National Society of Professional Engineers. Professional Engineering Directory. National ed. Atlanta, Ga.: BellSouth National Pub., 1985.

MLA (9th ed.) Citation

National Society of Professional Engineers. Professional Engineering Directory. National ed. BellSouth National Pub., 1985.

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