APA (7th ed.) Citation

Boothroyd, J. (2011). Loud or soft? high or low?: A look at sound.

Chicago Style (17th ed.) Citation

Boothroyd, Jennifer. Loud or Soft? High or Low?: A Look at Sound. 2011.

MLA (8th ed.) Citation

Boothroyd, Jennifer. Loud or Soft? High or Low?: A Look at Sound. 2011.

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