Cita APA (7a ed.)

Richards, A. J. (1997). Plant breedings systems (2nd ed.). Chapman & Hall.

Cita Chicago Style (17a ed.)

Richards, A. J. Plant Breedings Systems. 2nd ed. London: Chapman & Hall, 1997.

Cita MLA (8a ed.)

Richards, A. J. Plant Breedings Systems. 2nd ed. Chapman & Hall, 1997.