APA (7th ed.) Citation

Gai, J., Gomes, L., & Jansen De Cárdenas, C. (2009). Ptophobia: The fear of falling in elderly people.

Chicago Style (17th ed.) Citation

Gai, Juliana, Lucy Gomes, and Carmen Jansen De Cárdenas. Ptophobia: The Fear of Falling in Elderly People. 2009.

MLA (8th ed.) Citation

Gai, Juliana, et al. Ptophobia: The Fear of Falling in Elderly People. 2009.