APA (7th ed.) Citation

Dietrich, H. (1980). Bibliographia Orchidacearum Band 2: A-K. b. n.

Chicago Style (17th ed.) Citation

Dietrich, Helga. Bibliographia Orchidacearum Band 2: A-K. Jena: b. n, 1980.

MLA (9th ed.) Citation

Dietrich, Helga. Bibliographia Orchidacearum Band 2: A-K. b. n, 1980.

Warning: These citations may not always be 100% accurate.