↑ Marazzi, B.; และคณะ (2006). "Phylogenetic relationships within Senna (Leguminosae, Cassiinae) based on three chloroplast DNA regions: patterns in the evolution of floral symmetry and extrafloral nectaries". American Journal of Botany. 93 (2): 288–303. doi:10.3732/ajb.93.2.288. Explicit use of et al. in: |author= (help)
↑ Randell, B. R. and B. A. Barlow. 1998. Senna. pp 89-138. In: A. S. George (executive editor). Flora of Australia volume 12. Australian Government Publishing Service: Canberra, Australia.
↑ Huxley, A., et al. (1992). The New Royal Horticultural Society Dictionary of Gardening. The Macmillan Press, Limited: London. The Stockton Press: New York. ISBN 978-0-333-47494-5 (set).
