Cullen, J. (2006). Practical plant identificationIncluding a key to native and cultivated flowerwing plant in north temperate regionsJames Cullen. Cambridge University.
Chicago Style (17th ed.) CitationCullen, James. Practical Plant IdentificationIncluding a Key to Native and Cultivated Flowerwing Plant in North Temperate RegionsJames Cullen. Cambridge University, 2006.
MLA (8th ed.) CitationCullen, James. Practical Plant IdentificationIncluding a Key to Native and Cultivated Flowerwing Plant in North Temperate RegionsJames Cullen. Cambridge University, 2006.
Warning: These citations may not always be 100% accurate.