Subramanian, S. (1977). Bio-gas systems in Asia. Development Insititute.
シカゴスタイル引用形Subramanian, S.K. Bio-gas Systems in Asia. New Delhi: Development Insititute, 1977.
MLA引用形式Subramanian, S.K. Bio-gas Systems in Asia. Development Insititute, 1977.
警告: この引用は必ずしも正確ではありません.