APA

Goff Richard, Moss Walter, . (202). The twentieth century. New York: Mc Graw Hill.

Chicago

Goff Richard, Moss Walter, . 202. The twentieth century. New York: Mc Graw Hill.

Harvard

Goff Richard, Moss Walter, . (202). The twentieth century. New York: Mc Graw Hill.

MLA

Goff Richard, Moss Walter, . The twentieth century. New York: Mc Graw Hill. 202.