APA (7th ed.) Citation
Nyrop, R. F. (1969). . U.S government printing office.
Chicago Style (17th ed.) Citation
Nyrop, Richard F. . Washington D.C: U.S government printing office, 1969.
MLA (9th ed.) Citation
Nyrop, Richard F. . U.S government printing office, 1969.
Warning: These citations may not always be 100% accurate.