Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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