Não informado. (1991). Research Evaluation. Beech Tree Publishing.
Chicagoスタイル(17版)引用形式Não informado. Research Evaluation. Guildford, Inglaterra: Beech Tree Publishing, 1991.
MLA(8版)引用形式Não informado. Research Evaluation. Beech Tree Publishing, 1991.
警告: この引用は必ずしも正確ではありません.