Modak, P. (2021). Practicing circular economy (First edition.). CRC Press, Taylor & Francis Group.
Παραπομπή σε μορφή Chicago (17η εκδ.)Modak, Prasad. Practicing Circular Economy. First edition. Boca Raton: CRC Press, Taylor & Francis Group, 2021.
Παραπομπή σε μορφή MLA (9th εκδ.)Modak, Prasad. Practicing Circular Economy. First edition. CRC Press, Taylor & Francis Group, 2021.