(1971). Nature/Science annual. New York: Time Life Book.
Trích dẫn kiểu ChicagoNature/Science Annual. New York: Time Life Book, 1971.
MLA citiranjeNature/Science Annual. New York: Time Life Book, 1971.
Opozorilo: Ti citati niso vedno 100% točni.
(1971). Nature/Science annual. New York: Time Life Book.
Trích dẫn kiểu ChicagoNature/Science Annual. New York: Time Life Book, 1971.
MLA citiranjeNature/Science Annual. New York: Time Life Book, 1971.