Simpson, M. G. (2010). Plant systematics (2nd ed.). Elesevier.
Cita Chicago (17th ed.)Simpson, Michael G. Plant Systematics. 2nd ed. Amsterdam: Elesevier, 2010.
Cita MLA (9th ed.)Simpson, Michael G. Plant Systematics. 2nd ed. Elesevier, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.