Leger Sivard, R. World Military and social expenditures, 1987-88. World Priorities.
Cita Chicago Style (17a ed.)Leger Sivard, Ruth. World Military and Social Expenditures, 1987-88. Washington: World Priorities.
Cita MLA (9a ed.)Leger Sivard, Ruth. World Military and Social Expenditures, 1987-88. World Priorities.
警告：這些引文格式不一定是100％准確.