Hämäläinen, M. (1991). Principal variations in the chemical composition of peat. Swedish University of Agricultural Sciences, Dept. of Chemistry.
Chicagoスタイル(17版)引用形式Hämäläinen, Markku. Principal Variations in the Chemical Composition of Peat. Uppsala, Sweden: Swedish University of Agricultural Sciences, Dept. of Chemistry, 1991.
MLA(8版)引用形式Hämäläinen, Markku. Principal Variations in the Chemical Composition of Peat. Swedish University of Agricultural Sciences, Dept. of Chemistry, 1991.
警告: この引用は必ずしも正確ではありません.