APA (7th ed.) Citation

Vicente, P., & Lopes, I. (2016). Attitudes of older mobile phone users towards mobile phones.

Chicago Style (17th ed.) Citation

Vicente, P., and I. Lopes. Attitudes of Older Mobile Phone Users Towards Mobile Phones. 2016.

MLA (8th ed.) Citation

Vicente, P., and I. Lopes. Attitudes of Older Mobile Phone Users Towards Mobile Phones. 2016.

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