APA (7th ed.) Citation

Johnston, E. R. (1964). Orchid culture in silvabark. [publisher not identified].

Chicago Style (17th ed.) Citation

Johnston, Edward R. Orchid Culture in Silvabark. [Place of publication not identified]: [publisher not identified], 1964.

MLA (9th ed.) Citation

Johnston, Edward R. Orchid Culture in Silvabark. [publisher not identified], 1964.