Não informado. (2004). Knowledge: An illustrated magazine of science. [s.n.].
Style de citation Chicago (17e éd.)Não informado. Knowledge: An Illustrated Magazine of Science. [s.l.]: [s.n.], 2004.
Style de citation MLA (8e éd.)Não informado. Knowledge: An Illustrated Magazine of Science. [s.n.], 2004.
Attention : ces citations peuvent ne pas être correctes à 100%.