APA (7th ed.) Citation

Christensen, L. R. (1980). Relative productivity levels, 1947-1973: An international comparison. Social Systems Research Institute, University of Wisconsin-Madison.

Chicago Style (17th ed.) Citation

Christensen, Laurits R. Relative Productivity Levels, 1947-1973: An International Comparison. Madison WI: Social Systems Research Institute, University of Wisconsin-Madison, 1980.

MLA (9th ed.) Citation

Christensen, Laurits R. Relative Productivity Levels, 1947-1973: An International Comparison. Social Systems Research Institute, University of Wisconsin-Madison, 1980.