APA (7th ed.) Citation

Beris Ludwig, Simon S. Smith, & Helen Heussler. (2019). How Well Do Children Understand the Vocabulary of Sleep? SLACK Incorporated.

Chicago Style (17th ed.) Citation

Beris Ludwig, Simon S. Smith, and Helen Heussler. How Well Do Children Understand the Vocabulary of Sleep? SLACK Incorporated, 2019.

MLA (9th ed.) Citation

Beris Ludwig, et al. How Well Do Children Understand the Vocabulary of Sleep? SLACK Incorporated, 2019.

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