APA

Cherno M., . (1967). The contemporary world, since 1850. New York: McGraw-Hill.

Chicago

Cherno Melvin, . 1967. The contemporary world, since 1850. New York: McGraw-Hill.

Harvard

Cherno M., . (1967). The contemporary world, since 1850. New York: McGraw-Hill.

MLA

Cherno Melvin, . The contemporary world, since 1850. New York: McGraw-Hill. 1967.