United States. Department of State. Bureau of International Information Programs. (2012). The spirit of volunteerism. Bureau of International Information Programs, Department of State.
Chicagoスタイル(17版)引用形式United States. Department of State. Bureau of International Information Programs. The Spirit of Volunteerism. Washington, D.C: Bureau of International Information Programs, Department of State, 2012.
MLA(9版)引用形式United States. Department of State. Bureau of International Information Programs. The Spirit of Volunteerism. Bureau of International Information Programs, Department of State, 2012.
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