Allen, P. W. (1972). Natural rubber and the synthetics. London: Crosby Lockwood.
Chicago Style aipamenaAllen, P. W. Natural Rubber and the Synthetics. London: Crosby Lockwood, 1972.
MLA aipamenaAllen, P. W. Natural Rubber and the Synthetics. London: Crosby Lockwood, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.