Citazione APA

Harmer, S., & Shipley, A. (1970). Cambridge natural history: Flatworms etc. Today And Tommorow.

Stile di citazione Chicago

Harmer, S.F, e A.E Shipley. Cambridge Natural History: Flatworms Etc. New Delhi: Today And Tommorow, 1970.

Citazione MLA

Harmer, S.F, e A.E Shipley. Cambridge Natural History: Flatworms Etc. Today And Tommorow, 1970.