APA

Hellerstein J. K., Neumark D. & Troske K. R.Wages, productivity, and worker characteristics. : .

Chicago

Hellerstein Judith K, Neumark David and Troske Kenneth R.Wages, productivity, and worker characteristics. : .

Harvard

Hellerstein J. K., Neumark D. and Troske K. R.Wages, productivity, and worker characteristics. : .

MLA

Hellerstein Judith K, Neumark David and Troske Kenneth R.: . .