APA (7th ed.) Citation

Burggraf, S. P. (1978). State energy costs vary enough to affect economic development. Professional Engineer., 48, 23.

Chicago Style (17th ed.) Citation

Burggraf, S. P. "State Energy Costs Vary Enough to Affect Economic Development." Professional Engineer. 48 (1978): 23.

MLA (9th ed.) Citation

Burggraf, S. P. "State Energy Costs Vary Enough to Affect Economic Development." Professional Engineer., vol. 48, 1978, p. 23.