Delvin, S. (2007). environmental problems and issues. Sarup.
Chicagoスタイル(17版)引用形式Delvin, Samuel. Environmental Problems and Issues. New Delhi: Sarup, 2007.
MLA(9版)引用形式Delvin, Samuel. Environmental Problems and Issues. Sarup, 2007.
警告: この引用は必ずしも正確ではありません.