APA (7th ed.) Citation
Chauhan, B. S., & Johnson, D. E. (2008). Seed germination ecology of purple-leaf button weed (Borreria ocymoides) and Indian heliotrope (Heliotropium indicum): Two common weeds of rain-fed rice. Cambridge University Press.
Chicago Style (17th ed.) Citation
Chauhan, Bhagirath S., and David E. Johnson. Seed Germination Ecology of Purple-leaf Button Weed (Borreria Ocymoides) and Indian Heliotrope (Heliotropium Indicum): Two Common Weeds of Rain-fed Rice. Cambridge University Press, 2008.
MLA (9th ed.) Citation
Chauhan, Bhagirath S., and David E. Johnson. Seed Germination Ecology of Purple-leaf Button Weed (Borreria Ocymoides) and Indian Heliotrope (Heliotropium Indicum): Two Common Weeds of Rain-fed Rice. Cambridge University Press, 2008.
Warning: These citations may not always be 100% accurate.