Cita APA (7th ed.)
Romer, A. S. (1959). The vertebrate story. Univ of Chicago Press.
Cita Chicago (17th ed.)
Romer, Alfred S. The Vertebrate Story. Chicago: Univ of Chicago Press, 1959.
Cita MLA (9th ed.)
Romer, Alfred S. The Vertebrate Story. Univ of Chicago Press, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.