Barrett, J. M. (1986). Biology. Prentice-Hall.
Chicago Style aipamenaBarrett, James M. Biology. Englewood Cliffs, N. J: Prentice-Hall, 1986.
MLA aipamenaBarrett, James M. Biology. Prentice-Hall, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.