Martin Fowler, Kent Beck, John Brant, William Opdyke, Don Roberts. "Refactoring: Improving the Design of Existing Code (Google eBook)". section "Replace Nested Conditional with Guard Clauses". 2012. p. 237, p. 250. quote: "... one exit point mentality ... I don't follow the rule about one exit point from a method." نسخة محفوظة 17 أبريل 2015 على موقع واي باك مشين.
Martin Fowler, Kent Beck, John Brant, William Opdyke, Don Roberts. "Refactoring: Improving the Design of Existing Code (Google eBook)". section "Replace Nested Conditional with Guard Clauses". 2012. p. 237, p. 250. quote: "... one exit point mentality ... I don't follow the rule about one exit point from a method." نسخة محفوظة 17 أبريل 2015 على موقع واي باك مشين.