APA

Simson O. G. V., . (1964). The gothic cathedral. New York: Harper Torchbooks.

Chicago

Simson Otto Georg Von, . 1964. The gothic cathedral. New York: Harper Torchbooks.

Harvard

Simson O. G. V., . (1964). The gothic cathedral. New York: Harper Torchbooks.

MLA

Simson Otto Georg Von, . The gothic cathedral. New York: Harper Torchbooks. 1964.