APA

Summers L. H., Clarke R. N., .The Labor Scarcity Controversy Reconsidered. : .

Chicago

Summers Lawrence H, Clarke Richard N, .The Labor Scarcity Controversy Reconsidered. : .

Harvard

Summers L. H., Clarke R. N., .The Labor Scarcity Controversy Reconsidered. : .

MLA

Summers Lawrence H, Clarke Richard N, .: . .