Gaya APA

Botkin, D, B. (1990). Discordant harmonics : a new ecology for the twenty-first century . New York: PT.ELEX MEDIA KOMPUTINDO.

Gaya MLA

Botkin, Daniel, B.. "Discordant harmonics : a new ecology for the twenty-first century". New York: PT.ELEX MEDIA KOMPUTINDO, 1990. Text.