Não informado. (2004). International Development Abstracts. Geo Abstracts.
Chicagoスタイル(17版)引用形式Não informado. International Development Abstracts. Norwich, Inglaterra: Geo Abstracts, 2004.
MLA(8版)引用形式Não informado. International Development Abstracts. Geo Abstracts, 2004.
警告: この引用は必ずしも正確ではありません.