APA (7th ed.) Citation

Doolittle, J. H. (1989). Connector vectors: Creative thinking puzzles. Midwest Publications.

Chicago Style (17th ed.) Citation

Doolittle, John H. Connector Vectors: Creative Thinking Puzzles. Pacific Grove, CA: Midwest Publications, 1989.

MLA (9th ed.) Citation

Doolittle, John H. Connector Vectors: Creative Thinking Puzzles. Midwest Publications, 1989.

Warning: These citations may not always be 100% accurate.