Kruif, P. D. (1948). The male hormone. Permabooks.
Chicago Style (17th ed.) ZitazioaKruif, Paul De. The Male Hormone. New York: Permabooks, 1948.
MLA (9th ed.) ZitazioaKruif, Paul De. The Male Hormone. Permabooks, 1948.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.