Cita APA (7a ed.)

Richards, A. (1986). Plant breeding systems (2nd edition.). Chapman and Hall.

Cita Chicago Style (17a ed.)

Richards, A.J. Plant Breeding Systems. 2nd edition. London: Chapman and Hall, 1986.

Cita MLA (8a ed.)

Richards, A.J. Plant Breeding Systems. 2nd edition. Chapman and Hall, 1986.