Παραπομπή APA

(1949). Science: Nos 2819 - 2843. American association for the advancement of science.

Παραπομπή Chicago Style

Science: Nos 2819 - 2843. Lancaster: American association for the advancement of science, 1949.

Παραπομπή MLA

Science: Nos 2819 - 2843. American association for the advancement of science, 1949.