APA (7th ed.) Citation

G, R. B. (1999). Why Ergonomics? Plastics Engineering, 55(5), 37.

Chicago Style (17th ed.) Citation

G, Rutter B. "Why Ergonomics?" Plastics Engineering 55, no. 5 (1999): 37.

MLA (9th ed.) Citation

G, Rutter B. "Why Ergonomics?" Plastics Engineering, vol. 55, no. 5, 1999, p. 37.