Westerkamp, Hildegard. [s. d.] [1999]. « Soundscape Composition. Linking Inner and Outer Worlds ». colloque Soundscape before 2000, du 19 au 26 novembre. Amsterdam. <https://hildegardwesterkamp.ca/writings/writings-by/?post_id=19&title=%E2%80%8Bsoundscape-composition:-linking-inner-and-outer-worlds->.