Doolittle, J. H. (1989). Connector vectors: Creative thinking puzzles. Midwest Publications.
Chicago Style (17th ed.) CitationDoolittle, John H. Connector Vectors: Creative Thinking Puzzles. Pacific Grove, CA: Midwest Publications, 1989.
MLA (9th ed.) CitationDoolittle, John H. Connector Vectors: Creative Thinking Puzzles. Midwest Publications, 1989.
Warning: These citations may not always be 100% accurate.