APA (7th ed.) Citation

Maestro, M., & Maestro, G. (1996). What do you hear when cows sing?: And other silly riddles. HarperCollinsPublishers.

Chicago Style (17th ed.) Citation

Maestro, Marco, and Giulio Maestro. What Do You Hear When Cows Sing?: And Other Silly Riddles. [New York]: HarperCollinsPublishers, 1996.

MLA (8th ed.) Citation

Maestro, Marco, and Giulio Maestro. What Do You Hear When Cows Sing?: And Other Silly Riddles. HarperCollinsPublishers, 1996.

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