Penna, R. J., Scopes, N. E. A., & Ledieu, M. (1984). Pest and disease control of protected crops, outdoor bulbs and corms. BCPC Publications.
Chicago Style (17th ed.) CitationPenna, R. J., Nigel E. A. Scopes, and Michael Ledieu. Pest and Disease Control of Protected Crops, Outdoor Bulbs and Corms. Croydon: BCPC Publications, 1984.
MLA (9th ed.) CitationPenna, R. J., et al. Pest and Disease Control of Protected Crops, Outdoor Bulbs and Corms. BCPC Publications, 1984.
Warning: These citations may not always be 100% accurate.