APA-Zitierstil (7. Ausg.)

(1949). Postage stamps of the United States. Gov. Print. Office.

Chicago-Zitierstil (17. Ausg.)

Postage Stamps of the United States. Washington, DC: Gov. Print. Office, 1949.

MLA-Zitierstil (9. Ausg.)

Postage Stamps of the United States. Gov. Print. Office, 1949.