Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.