Cita APA (7th ed.)
Steen, E. B. (1971). Dictionary of biology. Barnes & Noble books.
Cita Chicago (17th ed.)
Steen, Edwin B. Dictionary of Biology. New York: Barnes & Noble books, 1971.
Cita MLA (9th ed.)
Steen, Edwin B. Dictionary of Biology. Barnes & Noble books, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.