APA (7th ed.) Citation

Koch, D., & MacCarthy, S. (2016). I've heard to mermaids singing.

Chicago Style (17th ed.) Citation

Koch, Douglas, and Sheila MacCarthy. I've Heard to Mermaids Singing. 2016.

MLA (9th ed.) Citation

Koch, Douglas, and Sheila MacCarthy. I've Heard to Mermaids Singing. 2016.

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