APA
williams r. t., .the biochemistry of vitamin b12,a symposium held at the london school of hygiene and tropical williams,richard tecwyn(ed.). 1st.ed. | .London Cambridge University: .
Chicago
williams richard tecwyn,ed, .the biochemistry of vitamin b12,a symposium held at the london school of hygiene and tropical williams,richard tecwyn(ed.). 1st.ed. | .London Cambridge University: .
Harvard
williams r. t., .the biochemistry of vitamin b12,a symposium held at the london school of hygiene and tropical williams,richard tecwyn(ed.). 1st.ed. | .London Cambridge University: .
MLA
williams richard tecwyn,ed, .1st.ed. | .London Cambridge University: . .