APA

National Cancer Institute (U.S.), . (19). The epidermal chalone and keratinizing epithelia. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 19. The epidermal chalone and keratinizing epithelia. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (19). The epidermal chalone and keratinizing epithelia. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . The epidermal chalone and keratinizing epithelia. [Washington, D.C: . 19.