APA (7th ed.) Citation

Eatwell, J., Milgate, M., & Newman, P. (1987). The New Palgrave: A dictionary of economics. MacMillan [etc.].

Chicago Style (17th ed.) Citation

Eatwell, John, Murray Milgate, and Peter Newman. The New Palgrave: A Dictionary of Economics. London [etc.]: MacMillan [etc.], 1987.

MLA (9th ed.) Citation

Eatwell, John, et al. The New Palgrave: A Dictionary of Economics. MacMillan [etc.], 1987.