Wrobel, P. S., & Gaspar de Oliveira, G. T. Managing arms in peace processes: Nicaragua and El Salvador. UNIDIR.
Lua i Stíl Chicago (17ú heag.)Wrobel, Paulo S., agus Guilherme Theophilo Gaspar de Oliveira. Managing Arms in Peace Processes: Nicaragua and El Salvador. Geneva: UNIDIR.
Lua MLA (9ú heag.)Wrobel, Paulo S., agus Guilherme Theophilo Gaspar de Oliveira. Managing Arms in Peace Processes: Nicaragua and El Salvador. UNIDIR.
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