APA (7th ed.) Citation

Smith, R. M., Aker, G. F., & Kidd, J. Handbook of Adult Educaton.

Chicago Style (17th ed.) Citation

Smith, Robert M., George F. Aker, and J.R Kidd. Handbook of Adult Educaton.

MLA (9th ed.) Citation

Smith, Robert M., et al. Handbook of Adult Educaton.