↑"Ambient". Dictionary by Merriam-Webster. Archived from the original on 2015-04-20.
↑"Ambient". Cambridge Dictionary. Archived from the original on 2018-02-12.
↑George Grove, Stanley Sadie, The New Grove Dictionary of Music and Musicians, Macmillan Publishers, 1st ed., 1980 (ISBN0-333-23111-2), vol. 7 (Fuchs to Gyuzelev), "André-Ernest-Modeste Grétry", p. 708: "in L'épreuve villageoise, where the various folk elements – couplet form, simplicity of style, straightforward rhythm, drone bass in imitation of bagpipes – combine to express at once ingenuous coquetry and sincerity."