Παραπομπή σε μορφή APA (7η εκδ.)

Watkins, R. J. (1926). The construction industry in Ohio: A statistical analysis of a seasonal industry. Bureau of Business Research, Ohio State University.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Watkins, Ralph J. The Construction Industry in Ohio: A Statistical Analysis of a Seasonal Industry. [Columbus]: Bureau of Business Research, Ohio State University, 1926.

Παραπομπή σε μορφή MLA (8th εκδ.)

Watkins, Ralph J. The Construction Industry in Ohio: A Statistical Analysis of a Seasonal Industry. Bureau of Business Research, Ohio State University, 1926.