Cita APA (7a ed.)

(1996). The National Plant Collections directory (Edición 1996.). National Council for the Conservation of Plants & Gardens.

Cita Chicago Style (17a ed.)

The National Plant Collections Directory. Edición 1996. London: National Council for the Conservation of Plants & Gardens, 1996.

Cita MLA (9a ed.)

The National Plant Collections Directory. Edición 1996. National Council for the Conservation of Plants & Gardens, 1996.