Weldon, H. A., Langacker, P., & Steinhardt, P. J. (1983). Fourth Workshop on Grand Unification: University of Pennsylvania, Philadelphia April 21-23, 1983. Birkhäuser Boston : Imprint : Birkhäuser.
Chicago Style (17th ed.) CitationWeldon, H. A., P. Langacker, and Paul J. Steinhardt. Fourth Workshop on Grand Unification: University of Pennsylvania, Philadelphia April 21-23, 1983. Boston, MA: Birkhäuser Boston : Imprint : Birkhäuser, 1983.
MLA (9th ed.) CitationWeldon, H. A., et al. Fourth Workshop on Grand Unification: University of Pennsylvania, Philadelphia April 21-23, 1983. Birkhäuser Boston : Imprint : Birkhäuser, 1983.
Warning: These citations may not always be 100% accurate.