APA-Zitierstil (7. Ausg.)

Cohen, R. H., Ferguson, W. W., & Xenakis, S. S. (1993). A cost comparison of serving rural and urban areas in the United States postal service. WIK.

Chicago-Zitierstil (17. Ausg.)

Cohen, Robert H., William W. Ferguson, und Spyros S. Xenakis. A Cost Comparison of Serving Rural and Urban Areas in the United States Postal Service. Bad Honnef: WIK, 1993.

MLA-Zitierstil (9. Ausg.)

Cohen, Robert H., et al. A Cost Comparison of Serving Rural and Urban Areas in the United States Postal Service. WIK, 1993.