Παραπομπή σε μορφή APA (7η εκδ.)

Northrup, H. R., Storholm, G. R., & paul, A. A. (1967). Restrictive labor practices in the supermarket industry. University of Pennsylvania Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Northrup, Herbert Roof, Gordon R. Storholm, και A. Abodeely paul. Restrictive Labor Practices in the Supermarket Industry. Philadelphia: University of Pennsylvania Press, 1967.

Παραπομπή σε μορφή MLA (9th εκδ.)

Northrup, Herbert Roof, et al. Restrictive Labor Practices in the Supermarket Industry. University of Pennsylvania Press, 1967.