Cita APA

Hodgson, M., Paine, R., & Anderson, N. (1991). Letts guide to orchids of the world. United Kingdom: Charles Letts.

Citación estilo Chicago

Hodgson, Margaret, Roland Paine, y Neville Anderson. Letts Guide to Orchids of the World. United Kingdom: Charles Letts, 1991.

Cita MLA

Hodgson, Margaret, Roland Paine, y Neville Anderson. Letts Guide to Orchids of the World. United Kingdom: Charles Letts, 1991.