Dyfyniad APA

Butler, D. (2001). nature yearbook of science and technology 2001. Nature Publishing Group.

Dyfyniad Arddull Chicago

Butler, Declan. Nature Yearbook of Science and Technology 2001. London: Nature Publishing Group, 2001.

Dyfyniad MLA

Butler, Declan. Nature Yearbook of Science and Technology 2001. Nature Publishing Group, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.