1. Barbour, E. K., Nabbut, N. H. & Al-Nakhli, H. M. (1983).Arb Gulf Journal of Scientific Research,1, 477–486.
2. Bauer, A. W., Kirby, W. M. M., Sherris, J. C. & Turck, M. (1966).American Journal of Clinical Pathology,45, 493–496.
3. Buchanan, R. E. & Gibbons, N. E. (1975).Bergey's Manual of Determinative Bacteriology, 8th edn. Williams and Wilkins Company, Baltimore.
4. Daniel, R. C. W., Boyle, D. O., Marek, M. S. & Frost, A. J. (1982).Australian Veterinary Journal,58, 143–147.
5. Department of Agriculture-Western Australia (1967). A survey of mastitis in Western Australia dairy cattle, pp. 1–48.