Citazione Stile APA (7a Edizione)

Schelpe, E. A. C. L. E. (1962). An Annotated Check-list of the Epiphytic Orchids of South Africa with Keys to the Genera and Species. Zenodo.

Citazione stile Chigago Style (17a edizione)

Schelpe, Edmund A. C. L. E. An Annotated Check-list of the Epiphytic Orchids of South Africa with Keys to the Genera and Species. Zenodo, 1962.

Citatione MLA (9a ed.)

Schelpe, Edmund A. C. L. E. An Annotated Check-list of the Epiphytic Orchids of South Africa with Keys to the Genera and Species. Zenodo, 1962.