APA
John R. Heller, . (19551956). Journal of the National Cancer Institute. Washington: The U. S. Department of Health.
Chicago
John R. Heller, . 19551956. Journal of the National Cancer Institute. Washington: The U. S. Department of Health.
Harvard
John R. Heller, . (19551956). Journal of the National Cancer Institute. Washington: The U. S. Department of Health.
MLA
John R. Heller, . Journal of the National Cancer Institute. Washington: The U. S. Department of Health. 19551956.