Gaya APA

Axtell, A, E. et al (2010). Lesser Celandine (Ranunculus ficaria): A Threat to Woodland Habitats in the Northern United States and Southern Canada (3, April–June 2010). New York: Weed Science Society America.

Gaya MLA

Axtell, Annie, E.. et al. "Lesser Celandine (Ranunculus ficaria): A Threat to Woodland Habitats in the Northern United States and Southern Canada". 3, April–June 2010 New York: Weed Science Society America, 2010. e-journal.