APA (7e ed.) Bronvermelding

Hämäläinen, M. (1991). Principal variations in the chemical composition of peat. Swedish University of Agricultural Sciences, Dept. of Chemistry.

Chicago (17e ed.) Bronvermelding

Hämäläinen, Markku. Principal Variations in the Chemical Composition of Peat. Uppsala, Sweden: Swedish University of Agricultural Sciences, Dept. of Chemistry, 1991.

MLA (8e ed.) Bronvermelding

Hämäläinen, Markku. Principal Variations in the Chemical Composition of Peat. Swedish University of Agricultural Sciences, Dept. of Chemistry, 1991.