Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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