APA

Mendel S., . (1969). Dictionary of science. New-York: Library of congress.

Chicago

Mendel Siegfried, . 1969. Dictionary of science. New-York: Library of congress.

Harvard

Mendel S., . (1969). Dictionary of science. New-York: Library of congress.

MLA

Mendel Siegfried, . Dictionary of science. New-York: Library of congress. 1969.