APA-viite

Chrispeels, M., & Sadava, D. (1977). Plants ,food and people. W.H freeman and co.

Chicago-tyylinen lähdeviittaus

Chrispeels, M.J, ja D. Sadava. Plants ,food and People. USA: W.H freeman and co, 1977.

MLA-viite

Chrispeels, M.J, ja D. Sadava. Plants ,food and People. W.H freeman and co, 1977.