Gaya APA

Maskulino, . (). Willingness to pay analysis for lake water resources conservation : Lake toba water conservation, parapat simalungun regency, north sumatera province. ( Tesis 2019 ) . : .

Gaya MLA

Maskulino, . "Willingness to pay analysis for lake water resources conservation : Lake toba water conservation, parapat simalungun regency, north sumatera province. ( Tesis 2019 )". : , . Text.