APA

Christensen E. O., . (1950). The index of American design. New York: Macmillan.

Chicago

Christensen Erwin Ottomar, . 1950. The index of American design. New York: Macmillan.

Harvard

Christensen E. O., . (1950). The index of American design. New York: Macmillan.

MLA

Christensen Erwin Ottomar, . The index of American design. New York: Macmillan. 1950.