Sept 14 (Reuters) - Australia's Citadel Group Ltd CGL.AX , an information technology services provider, said on Monday that an entity owned by the country's biggest private equity firm Pacific Equity Partners (PEP) proposed to buy the software company for A$448.6 million ($326.49 million).
The offer represents a premium of 43.2% to Citadel's closing price on Friday.
($1 = 1.3740 Australian dollars)