Maestro, M., & Maestro, G. (1996). What do you hear when cows sing?: And other silly riddles. HarperCollinsPublishers.
Style de citation Chicago (17e éd.)Maestro, Marco, et Giulio Maestro. What Do You Hear When Cows Sing?: And Other Silly Riddles. [New York]: HarperCollinsPublishers, 1996.
Style de citation MLA (8e éd.)Maestro, Marco, et Giulio Maestro. What Do You Hear When Cows Sing?: And Other Silly Riddles. HarperCollinsPublishers, 1996.
Attention : ces citations peuvent ne pas être correctes à 100%.