Warming, D. E. (1998). Systematic botany. Shree.
Cita Chicago (17th ed.)Warming, Dr. E. Systematic Botany. New Delhi: Shree, 1998.
Cita MLA (9th ed.)Warming, Dr. E. Systematic Botany. Shree, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.