APA

National Cancer Institute (U.S.), . (19). Extraction from bovine spleen of immunosuppressant with no activity on hematopoetic spleen colony formation. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 19. Extraction from bovine spleen of immunosuppressant with no activity on hematopoetic spleen colony formation. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (19). Extraction from bovine spleen of immunosuppressant with no activity on hematopoetic spleen colony formation. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Extraction from bovine spleen of immunosuppressant with no activity on hematopoetic spleen colony formation. [Washington, D.C: . 19.