U.S. Bureau of the Census. (1967). Pocket data book, U.S.A. U.S. Govt. Print. Off.].
Chicago Style aipamenaU.S. Bureau of the Census. Pocket Data Book, U.S.A. [Washington: U.S. Govt. Print. Off.], 1967.
MLA aipamenaU.S. Bureau of the Census. Pocket Data Book, U.S.A. U.S. Govt. Print. Off.], 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.