Sculpture of the twentieth century.

MLA

Ritchie, Andrew Carnduff. Sculpture of the Twentieth Century. New York City: The Museum of Modern Art, 1952.

APA

Ritchie, A. Carnduff. (1952). Sculpture of the twentieth century. New York City: The Museum of Modern Art.

Chicago

Ritchie, Andrew Carnduff Sculpture of the Twentieth Century. New York City: The Museum of Modern Art, 1952.