APA (7th ed.) Citation

Phillips, C. (2009). 50 puzzles for logical thinking / Charles Phillips. Connections.

Chicago Style (17th ed.) Citation

Phillips, Charles. 50 Puzzles for Logical Thinking / Charles Phillips. London: Connections, 2009.

MLA (9th ed.) Citation

Phillips, Charles. 50 Puzzles for Logical Thinking / Charles Phillips. Connections, 2009.

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