APA (7th ed.) Citation

Rittershausen, B., & Rittershausen, W. (1979). Orchids in colour. Blandford Press ; Distributed by Sterling Pub. Co..

Chicago Style (17th ed.) Citation

Rittershausen, Brian, and Wilma Rittershausen. Orchids in Colour. Poole : New York, N.Y.: Blandford Press ; Distributed by Sterling Pub. Co., 1979.

MLA (9th ed.) Citation

Rittershausen, Brian, and Wilma Rittershausen. Orchids in Colour. Blandford Press ; Distributed by Sterling Pub. Co., 1979.