Though general systems theory is currently the prevailing paradigm in family therapy and social work, there is no accessible text that treats its basic concepts. This book fills the gap by presenting the central ideas of general systems theory in clear and simple language, with a focus on the social sciences.
Find the errors and inform your professor. Even the editors screwed up equifinality and multifinality: Equi = many approaches may lead to one outcome. Multi = one approach may lead to many outcomes.
Just remember that, no matter how the definition changes.