Birtwistle, C. (1978). The calculator puzzle book. Bell Pub. Co..
Chicago Style (17th ed.) CitationBirtwistle, Claude. The Calculator Puzzle Book. New York: Bell Pub. Co., 1978.
MLA (8th ed.) CitationBirtwistle, Claude. The Calculator Puzzle Book. Bell Pub. Co., 1978.
Warning: These citations may not always be 100% accurate.