Cita APA

Christensen. (1980). Relative productivity levels, 1947- 1973: An international comparison. Cambrridge: Harvard Institute for Economic Research.

Chicago Style Citation

Christensen. Relative Productivity Levels, 1947- 1973: An International Comparison. Cambrridge: Harvard Institute for Economic Research, 1980.

Cita MLA

Christensen. Relative Productivity Levels, 1947- 1973: An International Comparison. Cambrridge: Harvard Institute for Economic Research, 1980.

Atenció: Aquestes cites poden no estar 100% correctes.