von Sachs, Julius; Garnsey, Henry E. F. (translator) (1890). History of Botany (1530–1860). Oxford at the Clarendon Press. p. 13. {{cite book}}: |author= has generic name (help)نگهداری یادکرد:نامهای متعدد:فهرست نویسندگان (link)
and
Vines, Sydney Howard (1913). "Robert Morison 1620–1683 and John Ray 1627–1705". In Oliver, Francis Wall (ed.). Makers of British botany. Cambridge University Press. p. 9.
