APA (7th ed.) Citation

Riddell, H., & Lappe, M. (2018). Heading Through a Crowd.

Chicago Style (17th ed.) Citation

Riddell, Hugh, and M. Lappe. Heading Through a Crowd. 2018.

MLA (9th ed.) Citation

Riddell, Hugh, and M. Lappe. Heading Through a Crowd. 2018.

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