APA

(1968). Aspects of form: A symposium on form in nature and art. New York: American Elsevier.

Chicago

1968. Aspects of form: A symposium on form in nature and art. New York: American Elsevier.

Harvard

(1968). Aspects of form: A symposium on form in nature and art. New York: American Elsevier.

MLA

Aspects of form: A symposium on form in nature and art. New York: American Elsevier. 1968.