Citazione Stile APA (7a Edizione)

Zomlefer, W. B. (1994). Guide to flowering plant families. University of North Carolina Press.

Citazione stile Chigago Style (17a edizione)

Zomlefer, Wendy B. Guide to Flowering Plant Families. Chapel Hill: University of North Carolina Press, 1994.

Citatione MLA (9a ed.)

Zomlefer, Wendy B. Guide to Flowering Plant Families. University of North Carolina Press, 1994.