International Orchid Commission on Classification, N., Gilmour, J. S. L. 1., Greatwood, J., & Hunt, P. F. (1976). Handbook on orchid nomenclature and registration (Second edition.). London: International Orchid Commission.
Chicago Style CitationInternational Orchid Commission on Classification, Nomenclature, John Scott Lennox 1906-1986 Gilmour, J. Greatwood, and Peter Francis Hunt. Handbook On Orchid Nomenclature and Registration. Second edition. London: International Orchid Commission, 1976.
MLA CitationInternational Orchid Commission on Classification, Nomenclature, John Scott Lennox 1906-1986 Gilmour, J. Greatwood, and Peter Francis Hunt. Handbook On Orchid Nomenclature and Registration. Second edition. London: International Orchid Commission, 1976.