APA (7th ed.) Citation

Stilwell, J. A., Lipsey, R. G., & Lipsey, R. G. (1967). Workbook to accompany An introduction to positive economics. Weidenfeld & Nicolson.

Chicago Style (17th ed.) Citation

Stilwell, J. A., Richard G. Lipsey, and Richard G. Lipsey. Workbook to Accompany An Introduction to Positive Economics. London: Weidenfeld & Nicolson, 1967.

MLA (8th ed.) Citation

Stilwell, J. A., et al. Workbook to Accompany An Introduction to Positive Economics. Weidenfeld & Nicolson, 1967.