APA (7th ed.) Citation

Robinson, M. A. (1990). Primulas: The complete guide (1. publ.). Crowood Press.

Chicago Style (17th ed.) Citation

Robinson, Mary A. Primulas: The Complete Guide. 1. publ. Swindon, Wiltshire: Crowood Press, 1990.

MLA (9th ed.) Citation

Robinson, Mary A. Primulas: The Complete Guide. 1. publ. Crowood Press, 1990.