Cita APA

Bechtel,Helmut. (1981). The manual of cultivated orchid species. Bath press.

Citación estilo Chicago

Bechtel,Helmut. The Manual of Cultivated Orchid Species. Great britain: Bath press, 1981.

Cita MLA

Bechtel,Helmut. The Manual of Cultivated Orchid Species. Bath press, 1981.