Cita APA (7a ed.)
ebrary, Inc. (1989). Opportunities in biology. National Academy Press.
Cita Chicago Style (17a ed.)
ebrary, Inc. Opportunities in Biology. Washington: National Academy Press, 1989.
Cita MLA (9a ed.)
ebrary, Inc. Opportunities in Biology. National Academy Press, 1989.
Precaución: Estas citas no son 100% exactas.