APA Format
Williams, Stephen J.; Torrens, Paul R.
. (1980;1993;1999). Introduction to health services. Albany, NY : Delmar
MLA Format
Williams, Stephen J.; Torrens, Paul R.
. Introduction to health services. Albany, NY : Delmar, 1980;1993;1999
Australian/Harvard Format
Williams, Stephen J.; Torrens, Paul R.
. 1980;1993;1999. Introduction to health services. Delmar, Albany, NY
Warning: These citations may not always be 100% accurate.