HUBBARD, L. R. (2007). Advanced procedure and axioms. Bridge Publication, Inc.
Lua i Stíl Chicago (17ú heag.)HUBBARD, L. Ron. Advanced Procedure and Axioms. California: Bridge Publication, Inc, 2007.
Lua MLA (9ú heag.)HUBBARD, L. Ron. Advanced Procedure and Axioms. Bridge Publication, Inc, 2007.
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