APA

Pólya G., Read R. C., . (1987). Combinatorial enumeration of groups, graphs, and chemical compounds. New York [u.a.]: Springer.

Chicago

Pólya George, Read Ronald C, . 1987. Combinatorial enumeration of groups, graphs, and chemical compounds. New York [u.a.]: Springer.

Harvard

Pólya G., Read R. C., . (1987). Combinatorial enumeration of groups, graphs, and chemical compounds. New York [u.a.]: Springer.

MLA

Pólya George, Read Ronald C, . Combinatorial enumeration of groups, graphs, and chemical compounds. New York [u.a.]: Springer. 1987.