APA-Zitierstil (7. Ausg.)

(1931). Operating revenues and operating expenses of class I steam railways in the United States. Government Printing Office.

Chicago-Zitierstil (17. Ausg.)

Operating Revenues and Operating Expenses of Class I Steam Railways in the United States. Washington: Government Printing Office, 1931.

MLA-Zitierstil (9. Ausg.)

Operating Revenues and Operating Expenses of Class I Steam Railways in the United States. Government Printing Office, 1931.