Cita APA (7a ed.)

Perrett, H. E., & Lethem, F. (1980). Human factors in project work. World Bank.

Cita Chicago Style (17a ed.)

Perrett, Heli E., y Francis Lethem. Human Factors in Project Work. Washington: World Bank, 1980.

Cita MLA (9a ed.)

Perrett, Heli E., y Francis Lethem. Human Factors in Project Work. World Bank, 1980.