(1969). Principles and recommendations for the 1970 population censuses. [s.n.].
Chicago Style (17th ed.) CitationPrinciples and Recommendations for the 1970 Population Censuses. New York: [s.n.], 1969.
MLA (9th ed.) CitationPrinciples and Recommendations for the 1970 Population Censuses. [s.n.], 1969.
Warning: These citations may not always be 100% accurate.