APA
Backhaus Ralph A, Walsh Sharon, . (1983). The ontogeny of rubber formation in guayule, Parthenium argentatum gray. : Botancal Gazette.
Chicago
Backhaus Ralph A, Walsh Sharon, . 1983. The ontogeny of rubber formation in guayule, Parthenium argentatum gray. : Botancal Gazette.
Harvard
Backhaus Ralph A, Walsh Sharon, . (1983). The ontogeny of rubber formation in guayule, Parthenium argentatum gray. : Botancal Gazette.
MLA
Backhaus Ralph A, Walsh Sharon, . The ontogeny of rubber formation in guayule, Parthenium argentatum gray. : Botancal Gazette. 1983.