't Hart, H. (1972). Chromosome numbers in the series Rupestria Berger of the genus Sedum L.
Chicago Style (17th ed.) Citation't Hart, H. Chromosome Numbers in the Series Rupestria Berger of the Genus Sedum L. Utrecht, 1972.
MLA (9th ed.) Citation't Hart, H. Chromosome Numbers in the Series Rupestria Berger of the Genus Sedum L. 1972.
Warning: These citations may not always be 100% accurate.