APA

Holborn H., . (1966). The political collapse of Europe. New York: Knopf.

Chicago

Holborn Hajo, . 1966. The political collapse of Europe. New York: Knopf.

Harvard

Holborn H., . (1966). The political collapse of Europe. New York: Knopf.

MLA

Holborn Hajo, . The political collapse of Europe. New York: Knopf. 1966.