Williams W. J., Beutler E. & Erslev A. J. (1990). Hematology. New York: McGRAW-HILL.
Williams William J, Beutler Ernest and Erslev Allan J. 1990. Hematology. New York: McGRAW-HILL.
Williams W. J., Beutler E. and Erslev A. J. (1990). Hematology. New York: McGRAW-HILL.
Williams William J, Beutler Ernest and Erslev Allan J. Hematology. New York: McGRAW-HILL. 1990.