Citazione Stile APA (7a Edizione)

Klein, U. Individuation and Classification of Plant Materials around 1800: Ursula Klein. Spaces of classification.(2003).

Citazione stile Chigago Style (17a edizione)

Klein, Ursula. "Individuation and Classification of Plant Materials Around 1800: Ursula Klein." Spaces of Classification.(2003) .

Citatione MLA (8a ed.)

Klein, Ursula. "Individuation and Classification of Plant Materials Around 1800: Ursula Klein." Spaces of Classification.(2003), .